The dynamic changing of Ca2+ cellular localization in maize leaflets under drought stress

Ma, Yuanyuan; Song, Weiyi; Liu, Zihui; Zhang, Hongmei; Guo, Xiaoqing; Shao, Hongbo; Fu-tai, NI

doi:10.1016/j.crvi.2008.12.003

Cited by 23 publications

(12 citation statements)

References 70 publications

(147 reference statements)

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“…This result showed that the increase of cytosolic Ca 2þ concentration induced by PEG was primarily due to extracellular Ca 2þ influx, and a little partially due to cytosolic Ca 2þ sources' release. This is in accordance with the results we have obtained in both guard cells and mesophyll cells through laser confocal and electronic microscopes technology [10,20].…”

Section: Discussionsupporting

confidence: 93%

Changes of cytosolic Ca2+ fluorescence intensity and plasma membrane calcium channels of maize root tip cells under osmotic stress

Liu

Guo

et al. 2010

Plant Physiology and Biochemistry

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Section: Discussionsupporting

confidence: 93%

Changes of cytosolic Ca2+ fluorescence intensity and plasma membrane calcium channels of maize root tip cells under osmotic stress

Liu

Guo

et al. 2010

Plant Physiology and Biochemistry

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“…EGTA, a calcium-chelating agent, is routinely used to establish the involvement of calcium ions in various physiological processes. [22][23][24][25][26][27][28][29][30][31][32][33][34][35] It forms stable, water-soluble complexes with calcium ions, thereby blocking their passage across plasma membrane into the cell. 24 Safadi et al 25 reported the presence of a calcium-dependent proteinase (CDP) activity in the roots of Arabidopsis, using in gel assays.…”

Section: Resultsmentioning

confidence: 99%

Co-localization of putative calcium channels (phenylalkylamine-binding sites) on oil bodies in protoplasts from dark-grown sunflower seedling cotyledons

Vandana

Bhatla

2009

Plant Signaling & Behavior

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IntroductionOilseeds store oil in the form of triacylglycerols (TAGs) in the organelles known as oil bodies. TAGs are rapidly converted to soluble metabolites via specialized metabolic pathways upon initiation of seed germination. 1 The protein constituents of oil bodies belong to the three major groups, comprising of structural proteins (oleosins and caleosins), enzymes (steroleosins and lipases) and minor proteins, like aquaporins. 2 The sequence of events prior to TAG hydrolysis by lipases to produce free fatty acids and glycerol, involves degradation of oleosins by a 65 kDa thiol protease 3,4 and phospholipid degradation by phospholipases. 5 This renders TAG matrix susceptible to lipase action. Oleosins are known to provide stability to oil bodies while caleosins play an important role in the biogenesis and degradation of oil bodies. 6,7 Calcium binding capacity of caleosins has been demonstrated in Arabidopsis and Sesamum indicum. 8,9 Recently, calcium concentrations as low as 100 nM have been shown to strongly modify the shape and aggregation state of purified oil bodies, thereby establishing the role of caleosins not only as a target for calcium-binding in artificial and purified oil bodies, but also as an effecter of oil body stability. 2 During seed germination, caleosins are involved in the interaction of lipid bodies with vacuoles and, thus, they play a role in the mobilization of storage lipids. 10 Based on these findings and observations from the author's laboratory on calcium-dependent proteolysis, the possibility of cation channels on/around the oil body surface for facilitating calcium availability could not be ruled out.In plant cells, ion channels permeable to Ca 2+ are so far known to exist on the plasma membrane, endoplasmic reticulum, tonoplast, nuclear and plastid membranes. 11 Electrophysiological studies have elucidated that plants possess Ca 2+ channels with different types of gating mechanisms, namely ligand-, voltageand stretch-activated. 12 Ca 2+ channels in plant cells are similar to the L-type channels characterized in animal systems. 13

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“…When Ca is applied to leaves, it enhances their ability to conserve water (Shao et al 2008 ) . In addition, Ma et al ( 2009 ) showed that Ca 2+ alters the degree of hydration of the plasma membrane and improves the cohesion of cell walls, which increases the viscosity of the protoplasm and the resistance of cells to dehydration. Berkowitz et al ( 2000 ) demonstrated that Ca 2+ inhibits the infl ux of K + to guard cells during water stress by affecting inward rectifying K + channels.…”

Section: Drought Stressmentioning

confidence: 98%

Uptake of Mineral Elements During Abiotic Stress

Duman

2011

Abiotic Stress Responses in Plants

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Several environmental factors infl uence the mineral uptake of plants, including pH, redox potential, and the presence of xenobiotics as well as the temperature and salinity. Changes in environmental conditions affect the biological and physiological response of plants. Most important targets of plants are maintained by the ion homeostasis and mineral uptake in stress conditions. Plants may use the different procedures to regulate homeostasis. In general, Na salt stress decreases the levels of cationic nutrients such as K, Ca, and Mg due to competition for ion transport sites. Drought and salinity stress are physiologically related and the tolerance mechanisms overlap. Metals can interfere with mineral nutrition and change the concentration and composition of plant nutrients. Besides, metals may also alter the conformation of proteins, including transporters, or regulator proteins. Herbicides may disrupt the function and integrity of the cell membrane, and signifi cant ion losses can occur. However, molecular mechanisms and genetic basis of interactions between abiotic stress and mineral uptake is lacking. Thus, future studies will focus on these aspects. In this chapter, the effects of some common stressors, such as salinity, drought, metals, herbicides, and on nutrient uptake are elucidated.

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The dynamic changing of Ca2+ cellular localization in maize leaflets under drought stress

Cited by 23 publications

References 70 publications

Changes of cytosolic Ca2+ fluorescence intensity and plasma membrane calcium channels of maize root tip cells under osmotic stress

Changes of cytosolic Ca2+ fluorescence intensity and plasma membrane calcium channels of maize root tip cells under osmotic stress

Co-localization of putative calcium channels (phenylalkylamine-binding sites) on oil bodies in protoplasts from dark-grown sunflower seedling cotyledons

Uptake of Mineral Elements During Abiotic Stress

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