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Ca^(2+)signaling in plant responses to abiotic stresses

Journal of Integrative Plant Biology 2022年第2期64卷 287-300页

作者： Qiuyan Dong Lukas Wallrad Bader O.Almutairi Jörg Kudla Institute of Plant Biology and Biotechnology WWU MünsterSchlossplatz 7Münster48149 Germany Department of Zoology College of ScienceKing Saud UniversityRiyadhKingdom of Saudi Arabia

Adverse variations of abiotic environmental cues that deviate from an optimal range impose stresses to plants.Abiotic stresses severely impede plant physiology and development.Consequently,such stresses dramatically reduce crop yield and negatively impact on ecosystem stability and composition.Physical components of abiotic stresses can be,for example,suboptimal temperature and osmotic perturbations,while representative chemical facets of abiotic stresses can be toxic ions or suboptimal nutrient availability.The sheer complexity of abiotic stresses causes a multitude of diverse components and mechanisms for their sensing and signal transduction.Ca^(2+),as a versatile second messenger,plays multifaceted roles in almost all abiotic stress responses in that,for a certain abiotic stress,Ca^(2+)is not only reciprocally connected with its perception,but also multifunctionally ensures subsequent signal transduction.Here,we will focus on salt/osmotic stress and responses to altered nutrient availability as model cases to detail novel insights into the identity of components that link stress perception to Ca^(2+)signal formation as well as on new insights into mechanisms of Ca^(2+)signal implementation.Finally,we will deduce emerging conceptual consequences of these novel insights and outline arising avenues of future research on the role of Ca^(2+)signaling in abiotic stress responses in plants.

关键词： abiotic stress calcium signaling nutrient stress salt stress

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Journal of Plant Ecology 2019年第4期12卷 615-623页

作者： Tao Yan Jiaojun Zhu Huanhuan Song Kai Yang CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyShenyang 110016China Qingyuan Forest CERN Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Aims Larch is the dominant timber species in Northeast China.However,compared with the adjacent secondary forests,soil available ni-trogen(N)significantly declined in~40-year-old larch plantations.Thus,it is of great importance to determine how N use strategies in larch change in response to declining soil N availability.Methods We investigated the changes in N concentration and ^(15)N natural abundance(δ^(15)N)from 18 August to 25 October in the leaves,stems,branches and roots of 1-year-old Larix kaempferi seedlings under nutrient-sufficient(NSu)and nutrient-starvation(NSt)condi-tions with a pot experiment in Northeast China.Important Findings Stem and branch N concentrations exhibited upward trends,and leaf N concentration exhibited a downward trend.Root N concentration exhibited an upward trend under NSu conditions,but a downward trend under NSt conditions.These results suggested that stems and branches were served as N storage organs,but roots shifted from storage to resorption organs when switched from NSu to NSt.Leaf nutrient resorption was intensely occurred on 11 October,as indi-cated by the sharply decreased leaf N concentration and increased stem,root and branch N concentrations.Theδ^(15)N of roots,branches and leaves overlapped between NSu and NSt approximately on 11 October,which may be regulated by isotope discrimination dur-ing N resorption.Leaf N resorption efficiency under NSt(76.33%)was significantly higher than that of NSu(56.76%),indicating that nutrient stress stimulates leaf N resorption.Taken together,larch seedlings enhance leaf nutrient resorption and shift roots from nu-trient storage to nutrient resorption to adapt to NSt conditions.These changes might relieve the adverse effects of declining soil nutrient availability on seedling survival and regeneration.

关键词： nutrient stress storage organ resorption organ redistribution stable nitrogen isotope

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Systemic Signaling and Local Sensing of Phosphate in Common Bean： Cross-Talk between Photosynthate and MicroRNA399

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Molecular Plant 2010年第2期3卷 428-437页

作者： Jun-Qi Liu Deborah L. Allan Carroll R Vance Department of Agronomy and Plant Genetics University of Minnesota St Paul MN 55108 USA Department of Soil Water and Climate University of Minnesota. St Paul MN 55108 USA United States Department of Agriculture Agricultural Research Service St Paul MN 55108 USA

Shoot-to-root communication is crucial for plant acclimation to phosphorus （P）-deficiency. Both sugars and miRNAs have been implicated as potential signal molecules transported through phloem from shoot to root for the reg- ulation of gene expression and Pi uptake in the root. By studying the expression patterns of both a serine/threonine phos- phatase gene （PvHAD1） and microRNA399 （miR399） in common bean （Phaseolus vulgaris L.）, we provide evidence for the interaction between light, phloem transport, and miR399 in the systemic regulation of gene expression under P-deficiency. Especially, miR399 expression in both the shoot and the root requires photosynthetic carbon assimilation during the onset of P-deficiency. In contrast to systemic signaling, local sensing was the primary causal factor for rapid down-regulation of PvHAD1 by Pi prior to the reduction of miR399 level in P-deficient roots. Furthermore, this initial response to Pi in P-de- ficient root was also mimicked by the Pi analog, phosphonate （Phi）. Our current findings suggest that plants have developed a highly coordinated dual regulatory pathway, namely long-distance signaling of P-deficiency from shoot to root versus local sensing of Pi in the root.

关键词： Roots nutrient stress photosynthate signaling.

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A Novel Rice Gene, NRR Responds to Macronutrient Deficiency and Regulates Root Growth

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Molecular Plant 2012年第1期5卷 63-72页

作者： Yu-Man Zhang Yong-Sheng Yan Li-Na Wang Kun Yang Na Xiao Yun-Feng Liu Ya-Ping Fu Zong-Xiu Sun Rong-Xiang Fang Xiao-Ying Chen State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China National Plant Gene Research Center Beijing 100101China Graduate School of the Chinese Academy of Sciences Beijing 100039China Department of Ornamental Horticulture and Landscape Architecture China Agricultural UniversityBeijing 100193China Current address:School of Life Science and Technology University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Rice Biology National Rice Research InstituteHangzhou 310006 China

To better understand the response of rice to nutrient stress, we have taken a systematic approach to identify rice genes that respond to deficiency of macronutrients and affect rice growth. We report here the expression and bio- logical functions of a previously uncharacterized rice gene that we have named NRR （nutrition response and root growth）. NRR is alternatively spliced, producing two 5＇-coterminal transcripts, NRRa and NRRb, encoding two proteins of 308 and 223 aa, respectively. Compared to NRRb, NRRa possesses an additional CCT domain at the C-terminus. Expression of NRR in rice seedling roots was significantly influenced by deficiency of macronutrients. Knock-down of expression of NRRa or NRRb by RNA interference resulted in enhanced rice root growth. By contrast, overexpression of NRRa in rice exhibited significantly retarded root growth. These results revealed that both NRRa and NRRb played negative regulatory roles in rice root growth. Our findings suggest that NRRa and NRRb, acting as the key components, modulate the rice root archi- tecture with the availability of macronutrients.

关键词： nutrient stress alternative splicing root growth rice.

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Effects of different soil moisture and nutrient regimes on photosynthesis and protective enzyme of oil palm seedling

Effects of different soil moisture and nutrient regimes on p...

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2011全国植物生物学研讨会

作者： Cao HongXing~(1,2),Sun ChengXu~(1,2),Lei XinTao~(1,2),Xiao Yong~(1,2) 1 Coconut Research Institute,Chinese Academy of Tropical Agricultural Sciences,Wenchang,Hainan 571339,China 2 Hainan Key Laboratory of Tropical Oil Crops Biology Wen chang,Hainan 571339,China

The aim of this paper was to investigated the photosynthesis and peroxidases response to two watering regimes(well-watered and water-stress conditions) and to two nutrient regimes(with or without fertilization) of oil palm.The net photosynthesis rate(Pn) and transpiration rate(Tr)of different treatments with similar two-peak and single-peak changing tendency,respectively.All treatments showed the lowest photosynthesis,transpiration rate when the comparatively higher air temperature light density and intercellular CO concentration at 12:00-13:00.The

关键词： photosynthesis rate transpiration rate physiology response water stress nutrient stress

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Nutritional stress promotes the induction of dormant colorectal cancer cells via regulating fatty acid oxidation

Nutritional stress promotes the induction of dormant colorec...

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第十四届全国免疫学学术大会

作者： Jing Liu Meng Zhang Ruyi Peng Haizhou Wang Zhongnan hospital of Wuhan university

Dormant cancer cells drive immune escape and recurrence, which lead to poor prognosis. Recent studies indicated that the adaptive faculty of cancer cells to nutrient limitation is one of the major factors to sustain survival during tumor progression. However, the correlation between dormant state and nutrient stress in colorectal cancer(CRC) remains unclear. Here, we showed that CRC cells can suffer from nutrient stress by entering dormant state. We further identified that nutrient stress upregulated the expression of Nanog to induce dormancy in CRC cells. Mechanistically, Nanog was regulated through a fatty acid oxidation(FAO)/ATP citrate lyase(ACLY)-dependent pathway. Enhanced FAO increased ACLY expression to promote the synthesis of acetyl-CoA, which was transferred by P300 to accelerate H3K27 acetylation of Nanog promoter. Then, Nanog upregulation increased the transcription of P21 and P27, which promoting the dormancy of CRC cells. Our findings corroborated that dormancy-enabled CRC cells survival through metabolic challenge and unlocked a specific mechanism to govern the process.

关键词： nutrient stress dormancy Nanog fatty acid oxidation citrate lyase

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