Faculty Profiles - MORI Izumi.C

Papers - MORI Izumi.C

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Cadmium uptake via apoplastic bypass flow in Oryza sativa Reviewed

Izumi C. Mori, Carlos Raul Arias-Barreiro, Lia Ooi, Nam-Hee Lee, Muhammad Abdus Sobahan, Yoshimasa Nakamura, Yoshihiko Hirai, Yoshiyuki Murata

Journal of Plant Research 134 ( 5 ) 1139 - 1148 2021.9

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media {LLC}

It is known that rice roots take up cadmium (Cd) via the symplastic route mediated by membrane-bound mineral transporters. Here we provide evidence that apoplastic bypass flow is another Cd uptake route in rice. High concentrations of Cd rendered apoplastic bypass flow rate increased in rice seedlings. These concentrations of Cd compromised membrane integrity in the root meristem and transition zone. Polyethleneglycol and proline inhibited the Cd-induced apoplastic bypass flow and Cd transfer to the shoots. Loss-of-function mutant of the Cd uptake transporter, nramp5, showed Cd transport to the shoot comparable to the wild type. At a low Cd concentration, increased apoplastic bypass flow rate by NaCl stress resulted in an elevation of Cd transport to shoots both in the wildtype and nramp5. These observations indicate that apoplastic bypass flow in roots carries Cd transport leading to xylem loading of Cd in addition to the symplastic pathway mediated by mineral transporters under stressed conditions.

DOI： 10.1007/s10265-021-01319-y

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Salicylic Acid Acts Antagonistically to Plastid Retrograde Signaling by Promoting the Accumulation of Photosynthesis-associated Proteins in Arabidopsis Reviewed

Yoshihiro Hirosawa, Akari Tada, Takakazu Matsuura, Izumi C Mori, Yoshitoshi Ogura, Tetsuya Hayashi, Susumu Uehara, Yasuko Ito-Inaba, Takehito Inaba

Plant and Cell Physiology 2021.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Oxford University Press ({OUP})

Plastids are involved in phytohormone metabolism as well as photosynthesis. However, the mechanism by which plastid retrograde signals and phytohormones cooperatively regulate plastid biogenesis remains elusive. Here, we investigated the effects of an inhibitor and a mutation that generate biogenic plastid signals on phytohormones, and vice versa. Inhibition of plastid biogenesis by norflurazon (NF)-treatment and the plastid protein import2 (ppi2) mutation caused a decrease in salicylic acid (SA) and jasmonic acid (JA). This effect can be attributed in part to the altered expression of genes involved in the biosynthesis and metabolism of SA and JA. However, SA-dependent induction of the PATHOGENESIS-RELATED1 gene was virtually unaffected in NF-treated plants and the ppi2 mutant. Instead, the level of chlorophyll in these plants was partially restored by exogenous application of SA. Consistent with this observation, the levels of some photosynthesis-associated proteins increased in the ppi2 and NF-treated plants in response to SA treatment. This regulation in true leaves seems to occur at post-transcriptional level, since SA treatment did not induce the expression of photosynthesis associated genes. In salicylic acid induction deficient 2 and lesions simulating disease resistance 1 mutants, endogenous SA regulates the accumulation of photosynthesis-associated proteins through transcriptional and post-transcriptional mechanisms. These data indicate that SA acts antagonistically to the inhibition of plastid biogenesis by promoting the accumulation of photosynthesis-associated proteins in Arabidopsis, suggesting a possible link between SA and biogenic plastid signaling.

DOI： 10.1093/pcp/pcab128

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Possible roles for phytohormones in controlling the stomatal behavior of Mesembryanthemum crystallinum during the salt-induced transition from C3 to crassulacean acid metabolism Reviewed International journal

Ayano Wakamatsu, Izumi C. Mori, Takakazu Matsuura, Yuichi Taniwaki, Ryotaro Ishii, Riichiro Yoshida

JOURNAL OF PLANT PHYSIOLOGY 262 153448 - 153448 2021.7

BdWRKY38 is required for the incompatible interaction of Brachypodium distachyon with the necrotrophic fungus Rhizoctonia solani Reviewed International journal

Yusuke Kouzai, Minami Shimizu, Komaki Inoue, Yukiko Uehara‐Yamaguchi, Kotaro Takahagi, Risa Nakayama, Takakazu Matsuura, Izumi C. Mori, Takashi Hirayama, Sobhy S. H. Abdelsalam, Yoshiteru Noutoshi, Keiichi Mochida

The Plant Journal 104 ( 4 ) 995 - 1008 2020.11

Language：English Publishing type：Research paper (scientific journal)

Rhizoctonia solani is a soil-borne necrotrophic fungus that causes sheath blight in grasses. The basal resistance of compatible interactions between R. solani and rice is known to be modulated by some WRKY transcription factors (TFs). However, genes and defense responses involved in incompatible interaction with R. solani remain unexplored, because no such interactions are known in any host plants. Recently, we demonstrated that Bd3-1, an accession of the model grass Brachypodium distachyon, is resistant to R. solani and, upon inoculation with the fungus, undergoes rapid induction of genes responsive to the phytohormone salicylic acid (SA) that encode the WRKY TFs BdWRKY38 and BdWRKY44. Here, we show that endogenous SA and these WRKY TFs positively regulate this accession-specific R. solani resistance. In contrast to a susceptible accession (Bd21), the infection process in the resistant accessions Bd3-1 and Tek-3 was suppressed at early stages before the development of fungal biomass and infection machinery. A comparative transcriptome analysis during pathogen infection revealed that putative WRKY-dependent defense genes were induced faster in the resistant accessions than in Bd21. A gene regulatory network (GRN) analysis based on the transcriptome dataset demonstrated that BdWRKY38 was a GRN hub connected to many target genes specifically in resistant accessions, whereas BdWRKY44 was shared in the GRNs of all three accessions. Moreover, overexpression of BdWRKY38 increased R. solani resistance in Bd21. Our findings demonstrate that these resistant accessions can activate an incompatible host response to R. solani, and BdWRKY38 regulates this response by mediating SA signaling.

DOI： 10.1111/tpj.14976

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Manganese Treatment Alleviates Zinc Deficiency Symptoms in Arabidopsis Seedlings. Reviewed

Sayuri Nakayama, Shigeo S Sugano, Haruna Hirokawa, Izumi C Mori, Hiroyuki Daimon, Sachie Kimura, Yoichiro Fukao

Plant & cell physiology 61 ( 10 ) 1711 - 1723 2020.10

Language：English Publishing type：Research paper (scientific journal)

Plant phenotypes caused by mineral deficiencies differ depending on growth conditions. We recently reported that the growth of Arabidopsis thaliana was severely inhibited on MGRL-based zinc (Zn)-deficient medium but not on Murashige-Skoog-based Zn-deficient medium. Here, we explored the underlying reason for the phenotypic differences in Arabidopsis grown on the different media. The root growth and chlorophyll contents reduced by Zn deficiency were rescued by the addition of extra manganese (Mn) during short-term growth (10 or 14 d). However, this treatment did not affect the growth recovery after long-term growth (38 d). To investigate the reason for plant recovery from Zn deficiency, we performed the RNA-seq analysis of the roots grown on the Zn-basal medium and the Zn-depleted medium with/without additional Mn. Principal component analysis of the RNA-seq data showed that the gene expression patterns of plants on the Zn-basal medium were similar to those on the Zn-depleted medium with Mn, whereas those on the Zn-depleted medium without Mn were different from the others. The expression of several transcription factors and reactive oxygen species (ROS)-related genes was upregulated in only plants on the Zn-depleted medium without Mn. Consistent with the gene expression data, ROS accumulation in the roots grown on this medium was higher than those grown in other conditions. These results suggest that plants accumulate ROS and reduce their biomass under undesirable growth conditions, such as Zn depletion. Taken together, this study shows that the addition of extra Mn to the Zn-depleted medium induces transcriptional changes in ROS-related genes, thereby alleviating short-term growth inhibition due to Zn deficiency.

DOI： 10.1093/pcp/pcaa094

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Low temperature modulates natural peel degreening in lemon fruit independently of endogenous ethylene. Reviewed International journal

Oscar W Mitalo, Takumi Otsuki, Rui Okada, Saeka Obitsu, Kanae Masuda, Yuko Hojo, Takakazu Matsuura, Izumi C Mori, Daigo Abe, William O Asiche, Takashi Akagi, Yasutaka Kubo, Koichiro Ushijima

Journal of experimental botany 71 ( 16 ) 4778 - 4796 2020.8

Language：English Publishing type：Research paper (scientific journal)

Peel degreening is an important aspect of fruit ripening in many citrus fruit, and previous studies have shown that it can be advanced by ethylene treatment or by low-temperature storage. However, the important regulators and pathways involved in natural peel degreening remain largely unknown. To determine how natural peel degreening is regulated in lemon fruit (Citrus limon), we studied transcriptome and physiochemical changes in the flavedo in response to ethylene treatment and low temperatures. Treatment with ethylene induced rapid peel degreening, which was strongly inhibited by the ethylene antagonist, 1-methylcyclopropene (1-MCP). Compared with 25 ºC, moderately low storage temperatures of 5-20 °C also triggered peel degreening. Surprisingly, repeated 1-MCP treatments failed to inhibit the peel degreening induced by low temperature. Transcriptome analysis revealed that low temperature and ethylene independently regulated genes associated with chlorophyll degradation, carotenoid metabolism, photosystem proteins, phytohormone biosynthesis and signalling, and transcription factors. Peel degreening of fruit on trees occurred in association with drops in ambient temperature, and it coincided with the differential expression of low temperature-regulated genes. In contrast, genes that were uniquely regulated by ethylene showed no significant expression changes during on-tree peel degreening. Based on these findings, we hypothesize that low temperature plays a prominent role in regulating natural peel degreening independently of ethylene in citrus fruit.

DOI： 10.1093/jxb/eraa206

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Interaction of intracellular hydrogen peroxide accumulation with nitric oxide production in abscisic acid signaling in guard cells. Reviewed International journal

Rayhanur Jannat, Takanori Senba, Daichi Muroyama, Misugi Uraji, Mohammad Anowar Hossain, Mohammad Muzahidul Islam, Yoshimasa Nakamura, Shintaro Munemasa, Izumi C Mori, Yoshiyuki Murata

Bioscience, biotechnology, and biochemistry 84 ( 7 ) 1418 - 1426 2020.7

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Informa {UK} Limited

Reactive oxygen species and nitric oxide (NO•) concomitantly play essential roles in guard cell signaling. Studies using catalase mutants have revealed that the inducible and constitutive elevations of intracellular hydrogen peroxide (H2O2) have different roles: only the inducible H2O2 production transduces the abscisic acid (ABA) signal leading stomatal closure. However, the involvement of inducible or constitutive NO• productions, if exists, in this process remains unknown. We studied H2O2 and NO• mobilization in guard cells of catalase mutants. Constitutive H2O2 level was higher in the mutants than that in wild type, but constitutive NO• level was not different among lines. Induced NO• and H2O2 levels elicited by ABA showed a high correlation with each other in all lines. Furthermore, NO• levels increased by exogenous H2O2 also showed a high correlation with stomatal aperture size. Our results demonstrate that ABA-induced intracellular H2O2 accumulation triggers NO• production leading stomatal closure. ABBREVIATIONS: ABA: abscisic acid; CAT: catalase; cGMP: cyclic guanosine monophosphate; DAF-2DA: 4,5-diaminofluorescein-2 diacetate; H2DCF-DA: 2',7'-dichlorodihydrofluorescein diacetate; MeJA: methyljasmonate; NOS: nitric oxide synthetase; NR: nitrate reductase; POX: peroxidase; ROS: reactive oxygen species; SNAP: S-nitroso-N-acetyl-DL-penicillamine; SNP: sodium nitroprusside; NOX: NADP(H) oxidase.

DOI： 10.1080/09168451.2020.1743168

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Application of the cellular oxidation biosensor to Toxicity Identification Evaluations for high-throughput toxicity assessment of river water Reviewed International journal

Lia Ooi, Keisuke Okazaki, Carlos R. Arias-Barreiro, Lee Yook Heng, Izumi C. Mori

Chemosphere 247 125933 - 125933 2020.5

Hormonal and transcriptional analyses of fruit development and ripening in different varieties of black pepper (Piper nigrum) Reviewed

Khew, C.-Y., Mori, I.C., Matsuura, T., Hirayama, T., Harikrishna, J.A., Lau, E.-T., Augustine Mercer, Z.J., Hwang, S.-S.

Journal of Plant Research 133 ( 1 ) 73 - 94 2020

Plant hormone profiling in developing seeds of common wheat (Triticum aestivum L.). Reviewed

Takakazu Matsuura, Izumi C Mori, Eiko Himi, Takashi Hirayama

Breeding science 69 ( 4 ) 601 - 610 2019.12

Reactive oxygen species and reactive carbonyl species constitute a feed-forward loop in auxin signaling for lateral root formation Reviewed International journal

Md Sanaullah Biswas, Hidehiro Fukaki, Izumi C. Mori, Kazuha Nakahara, Jun'ichi Mano

Plant Journal 100 ( 3 ) 536 - 548 2019.11

‘Passe Crassane’ pear fruit (Pyrus communis L.) ripening: Revisiting the role of low temperature via integrated physiological and transcriptome analysis Reviewed

Mitalo, O.W., Tosa, Y., Tokiwa, S., Kondo, Y., Azimi, A., Hojo, Y., Matsuura, T., Mori, I.C., Nakano, R., Akagi, T., Ushijima, K., Kubo, Y.

Postharvest Biology and Technology 158 110949 - 110949 2019

Disruption of ureide degradation affects plant growth and development during and after transition from vegetative to reproductive stages Reviewed International journal

Takagi H, Watanabe S, Tanaka S, Matsuura T, Mori IC, Hirayama T, Shimada H, Sakamoto A

BMC Plant Biology 18 ( 1 ) 287 - 287 2018.11

The Mechanism of SO₂ -Induced Stomatal Closure Differs from O₃ and CO₂ Responses and Is Mediated by Non-Apoptotic Cell Death in Guard Cells. Reviewed International journal

Ooi L, Matsuura T, Munemasa S, Murata Y, Katsuhara M, Hirayama T, Mori IC

Plant, cell & environment 42 ( 2 ) 437 - 447 2018.7

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Wiley

Plants closing stomata in the presence of harmful gases is believed to be a stress avoidance mechanism. SO2 , one of the major airborne pollutants, has long been reported to induce stomatal closure, yet the mechanism remains unknown. Little is known about the stomatal response to airborne pollutants besides O3 . SLOW ANION CHANNEL-ASSOCIATED 1 (SLAC1) and OPEN STOMATA 1 (OST1) were identified as genes mediating O3 -induced closure. SLAC1 and OST1 are also known to mediate stomatal closure in response to CO2 , together with RESPIRATORY BURST OXIDASE HOMOLOGs (RBOHs). The overlaying roles of these genes in response to O3 and CO2 suggested that plants share their molecular regulators for airborne stimuli. Here, we investigated and compared stomatal closure event induced by a wide concentration range of SO2 in Arabidopsis through molecular genetic approaches. O3 - and CO2 -insensitive stomata mutants did not show significant differences from the wild type in stomatal sensitivity, guard cell viability, and chlorophyll content revealing that SO2 -induced closure is not regulated by the same molecular mechanisms as for O3 and CO2 . Nonapoptotic cell death is shown as the reason for SO2 -induced closure, which proposed the closure as a physicochemical process resulted from SO2 distress, instead of a biological protection mechanism.

DOI： 10.1111/pce.13406

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A Cyclic Nucleotide-Gated Channel, HvCNGC2-3, Is Activated by the Co-Presence of Na⁺ and K⁺ and Permeable to Na⁺ and K⁺ Non-Selectively Reviewed International journal

Izumi Mori, Yuichi Nobukiyo, Yoshiki Nakahara, Mineo Shibasaka, Takuya Furuichi, Maki Katsuhara

Plants 7 ( 3 ) 61 - 61 2018.7

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：{MDPI} {AG}

Cyclic nucleotide-gated channels (CNGCs) have been postulated to contribute significantly in plant development and stress resistance. However, their electrophysiological properties remain poorly understood. Here, we characterized barley CNGC2-3 (HvCNGC2-3) by the two-electrode voltage-clamp technique in the Xenopus laevis oocyte heterologous expression system. Current was not observed in X. laevis oocytes injected with HvCNGC2-3 complementary RNA (cRNA) in a bathing solution containing either Na⁺ or K⁺ solely, even in the presence of 8-bromoadenosine 3',5'-cyclic monophosphate (8Br-cAMP) or 8-bromoguanosine 3',5'-cyclic monophosphate (8Br-cGMP). A weakly voltage-dependent slow hyperpolarization-activated ion current was observed in the co-presence of Na⁺ and K⁺ in the bathing solution and in the presence of 10 µM 8Br-cAMP, but not 8Br-cGMP. Permeability ratios of HvCNGC2-3 to K⁺, Na⁺ and Cl- were determined as 1:0.63:0.03 according to reversal-potential analyses. Amino-acid replacement of the unique ion-selective motif of HvCNGC2-3, AQGL, with the canonical motif, GQGL, resulted in the abolition of the current. This study reports a unique two-ion-dependent activation characteristic of the barley CNGC, HvCNGC2-3.

DOI： 10.3390/plants7030061

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Circumnutation and distribution of phytohormones in Vigna angularis epicotyls Reviewed

Motoyuki Iida, Toshihiko Takano, Takakazu Matsuura, Izumi C. Mori, Shingo Takagi

Journal of Plant Research 131 ( 1 ) 165 - 178 2018.1

Salicylic acid-dependent immunity contributes to resistance against Rhizoctonia solani, a necrotrophic fungal agent of sheath blight, in rice and Brachypodium distachyon. Reviewed International journal

Kouzai Y, Kimura M, Watanabe M, Kusunoki K, Osaka D, Suzuki T, Matsui H, Yamamoto M, Ichinose Y, Toyoda K, Matsuura T, Mori IC, Hirayama T, Minami E, Noutoshi Y

New Phytologist 217 ( 2 ) 771 - 783 2018.1

Glutamate functions in stomatal closure in Arabidopsis and fava bean (vol 129, pg 39, 2016)

Riichiro Yoshida, Izumi C. Mori, Nobuto Kamizono, Yudai Shichiri, Tetsuo Shimatani, Fumika Miyata, Kenji Honda, Sumio Iwai

JOURNAL OF PLANT RESEARCH 130 ( 6 ) 1095 - 1095 2017.11

Allantoin, a stress-related purine metabolite, can activate jasmonate signaling in a MYC2-regulated and abscisic acid-dependent manner (vol 67, pg 2519, 2016) Reviewed

Hiroshi Takagi, Yasuhiro Ishiga, Shunsuke Watanabe, Tomokazu Konishi, Mayumi Egusa, Nobuhiro Akiyoshi, Takakazu Matsuura, Izumi C. Mori, Takashi Hirayama, Hironori Kaminaka, Hiroshi Shimada, Atsushi Sakamoto

JOURNAL OF EXPERIMENTAL BOTANY 68 ( 17 ) 5011 - 5011 2017.8

Global profiling of phytohormone dynamics during combined drought and pathogen stress in Arabidopsis thaliana reveals ABA and JA as major regulators Reviewed

Aarti Gupta, Hiroshi Hisano, Yuko Hojo, Takakazu Matsuura, Yoko Ikeda, Izumi C. Mori, Muthappa Senthil-Kumar

SCIENTIFIC REPORTS 7 ( 1 ) 4017 2017.6

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Papers - MORI Izumi.C