Cell biological mechanism for triggering of ABA accumulation under water stress in Vicia faba leaves

Science in China. Series C, Life Sciences
D ZhangWensuo Jia

Abstract

Water stress-induced ABA accumulation is a cellular signaling process from water stress perception to activation of genes encoding key enzymes of ABA biosynthesis, of which the water stress-signal perception by cells or triggering mechanism of the ABA accumulation is the center in the whole process of ABA related-stress signaling in plants. The cell biological mechanism for triggering of ABA accumulation under water stress was studied in leaves of Vicia faba. Mannitol at 890 mmol * kg(-1) osmotic concentration induced an increase of more than 5 times in ABA concentration in detached leaf tissues, but the same concentration of mannitol only induced an increase of less than 40 % in ABA concentration in protoplasts. Like in detached leaf tissues, ABA concentration in isolated cells increased more than 10 times under the treatment of mannitol at 890 mmol * kg(-1) concentration, suggesting that the interaction between plasmalemma and cell wall was essential to triggering of the water stress-induced ABA accumulation. Neither Ca(2+)-chelating agent EGTA nor Ca(2+)channel activator A23187 nor the two cytoskeleton inhibitors, colchicine and cytochalasin B, had any effect on water stress-induced ABA accumulation. Interestingly water stre...Continue Reading

References

Jan 1, 1995·Annual Review of Physiology·H Sackin
Sep 12, 2002·Plant Physiology·K. Shinozaki, K. Yamaguchi-Shinozaki
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Jeffrey Leung, Jerome Giraudat
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·J. Ingram, D. Bartels
Feb 1, 1999·Cellular and Molecular Life Sciences : CMLS·J J Rudd, V E Franklin-Tong

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