Article
Plant Sciences
David Israel, Shanjida Khan, Charles R. Warren, Janusz J. Zwiazek, T. Matthew Robson
Summary: The roles of different plasma membrane aquaporins in leaf-level gas exchange of Arabidopsis thaliana are influenced by the growth environment, with PIPs contributing more to g(s) under low humidity conditions, and AtPIP2;5 possibly playing a role in regulating CO2 membrane permeability.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Agronomy
Manish Sharma, Jiayin Pang, Zhihui Wen, Axel De Borda, Hee Sun Kim, Yifei Liu, Hans Lambers, Megan H. Ryan, Kadambot H. M. Siddique
Summary: The study investigated the effects of water stress under low phosphorus supply on P-acquisition by chickpea and identified a genotype with faster relative growth and P-acquisition rates. ICC 2884 genotype showed faster P-acquisition rate with greater specific root length, smaller mean root diameter, and increased rhizosheath carboxylates in response to water stress. It also maintained similar physiological P-use efficiency under water stress, making it recommended for chickpea breeding in low-P and terminal drought environments.
Article
Biochemistry & Molecular Biology
Steven M. Driever, Leon Mossink, Diego Nunez Ocana, Elias Kaiser
Summary: To improve crop water use efficiency and drought stress resistance, a method for quickly assessing transpiration rate (E) and stomatal conductance (gs) of individual plants was developed using whole-plant thermal imaging. The method involves rapidly changing aerial humidity in a controlled environment to induce changes in leaf temperature. The results showed that leaf temperature correlated well with E and gs, making it a potential proxy for assessing these parameters. This noninvasive and remote method could be upscaled for use in rapid plant phenotyping systems.
Article
Plant Sciences
Hamada AbdElgawad, Gaurav Zinta, Johann Hornbacher, Jutta Papenbrock, Marios N. Markakis, Han Asard, Gerrit T. S. Beemster
Summary: The study found that increased CO2 concentration has a significant effect on drought resistance, especially through the promotion of aliphatic glucosinolate (GL) synthesis. By regulating the expression of transcription factors ABI5 and WRKY63, the synergistic effect of MYB28/29, and increasing the accumulation of GL precursors, CO2 can promote GL synthesis. In addition, overexpression of MYB28, 29, and 76 genes can improve drought tolerance by maintaining plant water and stomatal closure, while the loss of cyp79f genes weakens the drought resistance and mitigating effect of CO2.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Zaiqiang Yang, Yuhan Jiang, Rangjian Qiu, Xuewen Gong, Evgenios Agathokleous, Wei Hu, Brent Clothier
Summary: Heat stress has a significant impact on plant production, and the response mechanism of evapotranspiration to heat stress is still unclear. This study investigated the effects of heat stress on transpiration and evapotranspiration in gerbera plants. The results showed that transpiration was mainly inhibited at the beginning of heat stress, and the duration and extent of inhibition increased with longer heat stress duration.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Bailin Duan, Xiaofang Xie, Yanhua Jiang, Ning Zhu, Hongli Zheng, Yuxin Liu, Xuejun Hua, Yanyan Zhao, Yuqiang Sun
Summary: GhMYB44 gene plays a crucial role in plant response to abiotic stress, but its function in cotton is not well understood. In this study, GhMYB44 was induced by drought and ABA treatment in cotton. Silencing GhMYB44 resulted in physiological changes, including increased malondialdehyde content and decreased SOD activity. The silenced plants also exhibited increased stomatal aperture, water loss rate, and decreased drought tolerance.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Plant Sciences
Joo Yong Kim, Seung Ju Lee, Wang Ki Min, Seoyeon Cha, Jong Tae Song, Hak Soo Seo
Summary: COP1 is involved in regulating stomatal aperture and leaf temperature in response to normal and stress conditions. Mutations in COP1 lead to wider stomatal aperture and lower leaf temperature in Arabidopsis.
Article
Plant Sciences
Walter Krystler Israel, Alexander Watson-Lazowski, Zhong-Hua Chen, Oula Ghannoum
Summary: The photosynthetic type of grasses affects their intrinsic water use efficiency. C-4 grasses have higher intrinsic water use efficiency and CO2 assimilation rates, and lower stomatal conductance and operational stomatal aperture. Stomatal size and density do not vary according to the photosynthetic type. Overall, intrinsic water use efficiency and stomatal conductance depend most on operational stomatal aperture and density of open stomata.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Green & Sustainable Science & Technology
Jingtao Qin, Xiaosen Wang, Xichao Fan, Mingliang Jiang, Mouchao Lv
Summary: Based on a 3-year field experiment in the North China Plain, it was found that increasing planting density of maize can increase leaf area index but decrease leaf stomatal conductance. The optimal grain yield of maize was achieved at a density of about 80,000 plants ha(-1). The effect of planting density on soil water use by maize depends on the soil water content in the 0-60 cm soil layer. It was observed that increasing planting density did not affect soil water use unless the water content in the 0-60 cm soil layer was insufficient.
Article
Multidisciplinary Sciences
Fei Li, Jingfeng Xiao, Jiquan Chen, Ashley Ballantyne, Ke Jin, Bing Li, Michael Abraha, Ranjeet John
Summary: Global ecosystem water use efficiency (WUEeco) has not increased since 2001 due to the asymmetric effects of increased vapor pressure deficit (VPD), which suppressed photosynthesis and enhanced evapotranspiration (ET). Projected increases in VPD are expected to affect the coupling of terrestrial carbon and water cycles in the future.
Article
Ecology
Marcus Breil, Annabell Weber, Joaquim G. Pinto
Summary: Deciduous forests, with higher albedo, reduced stomatal resistance, and deeper root system compared to coniferous forests, have the potential to reduce heat intensity during heat periods in Europe. A simulation experiment replacing all coniferous forests with deciduous forests showed a slight reduction in mean daily maximum temperatures, with larger cooling effects in southwestern France and northern Turkey. However, the magnitude of temperature reduction is small and limited, suggesting that increasing the deciduous forest fraction alone is not an effective strategy to mitigate heat extremes in Europe.
Article
Plant Sciences
Carlos Augusto Manacorda, Gustavo Gudesblat, Moira Sutka, Sergio Alemano, Franco Peluso, Patricio Oricchio, Irene Baroli, Sebastian Asurmendi
Summary: The study revealed that TuMV infection results in stomatal closure in Arabidopsis, altering plant water balance, hormonal balance, and drought tolerance. Despite lower relative water loss during infection, plants simultaneously subjected to drought and viral stresses showed higher mortality rates.
PLANT CELL AND ENVIRONMENT
(2021)
Review
Plant Sciences
Michael R. Blatt, Mareike Jezek, Virgilio L. Lew, Adrian Hills
Summary: Stomatal pores enable gaseous exchange between leaf air spaces and the atmosphere, opening for CO2 entry during photosynthesis and closing to minimize water loss. Modeling the response of stomata to the environment has been an area of interest to understand its implications for plants and ecosystems. While models focusing on stomatal conductance make sense, it is important to connect them with the mechanics of guard cells that regulate pore size in order to comprehend the decisions made by stomata and their effects on the plant and global environment.
TRENDS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Alaka Swain, Deeptirekha Behera, Subhasis Karmakar, Manaswini Dash, Bisnu Prasad Dash, Padmini Swain, Kutubuddin A. Molla, Mirza J. Baig
Summary: By introducing foxtail millet C4 genes PPDK and NADP-ME into rice, photosynthetic efficiency and yield can be significantly improved. Transgenic rice plants with higher expression and activity of PPDK and NADP-ME genes exhibit better drought tolerance and yield traits.
JOURNAL OF PLANT PHYSIOLOGY
(2021)
Article
Plant Sciences
Theoni Margaritopoulou, Dimosthenis Kizis, Dimitris Kotopoulis, Ioannis E. Papadakis, Christos Anagnostopoulos, Eirini Baira, Aikaterini Termentzi, Aikaterini-Eleni Vichou, Carlo Leifert, Emilia Markellou
Summary: Analysis of commercially available intermediate resistant courgette varieties showed that they exhibited enhanced defense responses, including increased callose production, upregulation of salicylic acid defense signaling pathway genes, and accumulation of SA and defense metabolites. These varieties also displayed an altered epigenetic landscape in histone marks that affect transcriptional activation.
Article
Biochemistry & Molecular Biology
Yoshinori Utsumi, Maho Tanaka, Chikako Utsumi, Satoshi Takahashi, Akihiro Matsui, Atsushi Fukushima, Makoto Kobayashi, Ryosuke Sasaki, Akira Oikawa, Miyako Kusano, Kazuki Saito, Mikiko Kojima, Hitoshi Sakakibara, Punchapat Sojikul, Jarunya Narangajavana, Motoaki Seki
Summary: The integrative omics approach revealed crosstalk among phytohormones during tuberous root development in cassava, with the effects of different hormones on various stages of plant growth being clarified.
PLANT MOLECULAR BIOLOGY
(2022)
Article
Plant Sciences
Sakiko Ishida, Hidemasa Suzuki, Aya Iwaki, Shogo Kawamura, Shohei Yamaoka, Mikiko Kojima, Yumiko Takebayashi, Katsushi Yamaguchi, Shuji Shigenobu, Hitoshi Sakakibara, Takayuki Kohchi, Ryuichi Nishihama
Summary: In this study, it was demonstrated that in the liverwort Marchantia polymorpha, the decrease in endogenous auxin level at the cut surface of decapitated explants induced the expression of a key transcription factor gene, MpLAXR. The expression of MpLAXR was able to overcome the inhibition of regeneration by exogenously applied auxin, and ectopic expression of MpLAXR promoted cell proliferation in normally quiescent tissues. These findings provide insights into stem cell regulation and apical dominance establishment in land plants.
PLANT AND CELL PHYSIOLOGY
(2022)
Article
Plant Sciences
Kota Monden, Mikiko Kojima, Yumiko Takebayashi, Takamasa Suzuki, Tsuyoshi Nakagawa, Hitoshi Sakakibara, Takushi Hachiya
Summary: This study investigates the role of root-derived cytokinins (CKs) in promoting shoot growth by using a double-knockout mutant of CK receptors AHK2 and AHK3 in Arabidopsis. The results show that the deficiency of AHK2 and AHK3 in roots leads to increased concentrations of CKs and enhances shoot growth. Despite the induction of CK biosynthesis genes and the repression of CK degradation genes in the roots, the enhancement of shoot growth is only partially attributed to the increased amount of root-derived CKs perceived by the shoots, suggesting involvement of unknown mechanisms distinct from CK signaling.
PLANT AND CELL PHYSIOLOGY
(2022)
Article
Plant Sciences
Takayuki Fujita, Marcel Pascal Beier, Mayumi Tabuchi-Kobayashi, Yoshitaka Hayatsu, Haruka Nakamura, Toshiko Umetsu-Ohashi, Kazuhiro Sasaki, Keiki Ishiyama, Emiko Murozuka, Mikiko Kojima, Hitoshi Sakakibara, Yuki Sawa, Akio Miyao, Toshihiko Hayakawa, Tomoyuki Yamaya, Soichi Kojima
Summary: This study investigates the unique physiological roles of GS1;3 in the early stage of seed germination and grain filling under N deficient conditions in rice, and its impact on rice growth and yield.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biology
Kyosuke Kawai, Sayaka Takehara, Toru Kashio, Minami Morii, Akihiko Sugihara, Hisako Yoshimura, Aya Ito, Masako Hattori, Yosuke Toda, Mikiko Kojima, Yumiko Takebayashi, Hiroyasu Furuumi, Ken-Ichi Nonomura, Bunzo Mikami, Takashi Akagi, Hitoshi Sakakibara, Hidemi Kitano, Makoto Matsuoka, Miyako Ueguchi-Tanaka
Summary: This study reveals the function of rice gibberellin synthetic enzyme OsGA3ox1 in anther development and pollen accumulation, as well as its importance in evolution. The findings are significant for understanding plant reproduction and evolution.
COMMUNICATIONS BIOLOGY
(2022)
Article
Plant Sciences
Ryo Tabata, Takehiro Kamiya, Shunpei Imoto, Hana Tamura, Kumiko Ikuta, Michika Tabata, Tasuku Hirayama, Hironaka Tsukagoshi, Keitaro Tanoi, Takamasa Suzuki, Takushi Hachiya, Hitoshi Sakakibara
Summary: Plants have evolved sophisticated systemic processes to optimize their nutrient acquisition efficiency in heterogeneous soil environments. This study investigates the molecular basis of long-distance signaling in response to iron starvation and reveals the regulatory mechanism of iron homeostasis in plants.
PLANT AND CELL PHYSIOLOGY
(2022)
Article
Plant Sciences
Misato Kawai, Ryo Tabata, Miwa Ohashi, Haruno Honda, Takehiro Kamiya, Mikiko Kojima, Yumiko Takebayashi, Shunsuke Oishi, Satoru Okamoto, Takushi Hachiya, Hitoshi Sakakibara
Summary: This study investigated the response of Oryza longistaminata to spatially heterogeneous nitrogen availability. The results showed that compensatory enhancement of ammonium uptake occurred in the sufficient-side root when roots of the ramet pairs were exposed to ammonium-sufficient and ammonium-deficient conditions. Comparative transcriptome analysis revealed the activation of a gene regulatory network for effective ammonium assimilation and amino acid biosynthesis in the sufficient-side roots.
Article
Cell Biology
Miyako Kusano, Kanjana Worarad, Atsushi Fukushima, Ken Kamiya, Yuka Mitani, Yozo Okazaki, Yasuhiro Higashi, Ryo Nakabayashi, Makoto Kobayashi, Tetsuya Mori, Tomoko Nishizawa, Yumiko Takebayashi, Mikiko Kojima, Hitoshi Sakakibara, Kazuki Saito, Shuhei Hao, Yoshihito Shinozaki, Yoshihiro Okabe, Junji Kimbara, Tohru Ariizumi, Hiroshi Ezura
Summary: Parthenocarpy can increase tomato fruit production, but the use of artificial hormones can be costly and result in deformed fruit. This study explores the role of transcription factors and protein-coding genes in parthenocarpic mutants and suggests that controlling specific genes and metabolites can inform breeding strategies for tomatoes.
Editorial Material
Plant Sciences
Makoto Hayashi, Ari Pekka Mahonen, Hitoshi Sakakibara, Keiko U. Torii, Masaaki Umeda
PLANT AND CELL PHYSIOLOGY
(2023)
Article
Plant Sciences
Satoru N. Kinoshita, Takamasa Suzuki, Takatoshi Kiba, Hitoshi Sakakibara, Toshinori Kinoshita
Summary: Plant growth and development rely on plasma membrane proton-translocating adenosine triphosphatase (H+-ATPase), which is activated by phosphorylation. Small Auxin-Up RNA proteins regulate the phosphorylation level by inhibiting dephosphorylation. Photosynthetically active radiation activates H+-ATPase, and phosphorylation depends on photosynthesis and sugar supplementation. The molecular mechanism and physiological role of this activation are still unknown.
PLANT AND CELL PHYSIOLOGY
(2023)
Article
Horticulture
Takuya Fukasawa, Mikiko Kojima, Yumiko Takebayashi, Hitoshi Sakakibara, Ken-ichi Matsushima, Ken-ichiro Yasuba, Yuichi Yoshida, Tanjuro Goto, Yoshikuni Kitamura
Summary: This study investigated the mechanisms of the green flower phenotype in a lily cultivar called 'Doubleen', focusing on the accumulation of jasmonic acid (JA). The results suggest that the loss of JA biosynthesis site in the flowers of 'Doubleen' leads to the formation of unexpanded green tepals on their flowers.
SCIENTIA HORTICULTURAE
(2023)
Article
Plant Sciences
Takatoshi Kiba, Kahori Mizutani, Aimi Nakahara, Yumiko Takebayashi, Mikiko Kojima, Tokunori Hobo, Yuriko Osakabe, Keishi Osakabe, Hitoshi Sakakibara
Summary: Trans-zeatin-type cytokinins are synthesized by the cytochrome P450 monooxygenases CYP735As in rice and control the growth of both roots and shoots. These cytokinins have been shown to be important for shoot growth promotion in the model plant Arabidopsis. However, their role in monocots and plants with different side-chain profiles like rice is not well understood. In this study, the researchers characterized CYP735A3 and CYP735A4 and found that they are required for the modification of trans-zeatin-type side chains in rice. They also discovered that trans-zeatin cytokinins regulate the growth of both roots and shoots in response to various internal and environmental signals.
Article
Biochemistry & Molecular Biology
Sandra S. Scholz, Emanuel Barth, Gilles Clement, Anne Marmagne, Jutta Ludwig-Mueller, Hitoshi Sakakibara, Takatoshi Kiba, Jesus Vicente-Carbajosa, Stephan Pollmann, Anne Krapp, Ralf Oelmueller
Summary: The endophytic fungus Piriformospora indica promotes root and shoot growth of its host plants. It supports the host's adaptation to nitrogen limitation by delivering reduced nitrogen metabolites and altering the expression of transporter genes involved in nitrogen relocation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Multidisciplinary Sciences
Mikiko Kojima, Nobue Makita, Kazuki Miyata, Mika Yoshino, Akira Iwase, Miwa Ohashi, Alicia Surjana, Toru Kudo, Noriko Takeda-Kamiya, Kiminori Toyooka, Akio Miyao, Hirohiko Hirochika, Tsuyu Ando, Ayahiko Shomura, Masahiro Yano, Toshio Yamamoto, Tokunori Hobo, Hitoshi Sakakibara
Summary: In the final step of cytokinin biosynthesis, the main pathway involves the elimination of a ribose-phosphate group from the cytokinin nucleotide precursor. This reaction is catalyzed by the enzyme phosphoribohydrolase, encoded by the LONELY GUY (LOG) gene. Additionally, the LOG-independent pathway, which involves dephosphorylation and deribosylation, is also thought to contribute to cytokinin biosynthesis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Yukari Nagatoshi, Kenta Ikazaki, Yasufumi Kobayashi, Nobuyuki Mizuno, Ryohei Sugita, Yumiko Takebayashi, Mikiko Kojima, Hitoshi Sakakibara, Natsuko I. Kobayashi, Keitaro Tanoi, Kenichiro Fujii, Junya Baba, Eri Ogiso-Tanaka, Masao Ishimoto, Yasuo Yasui, Tetsuji Oya, Yasunari Fujita
Summary: Drought significantly affects crop production even under mild conditions. In this study, the authors develop a ridge-induced mild drought system in the field and find that phosphate starvation response occurs before ABA response in early mild drought. Their observations in both the field and laboratory provide insights into the molecular response to mild drought in field-grown plants and the relationship between nutrition and drought stress response.
NATURE COMMUNICATIONS
(2023)