期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 43, 期 4, 页码 419-422出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2005.01.021
关键词
leaf extension growth; water stress; expansin; gene expression
Adding PEG to the nutrient medium of maize (Zea mays L., hybrid Harkovskaya 310 MV) plants arrested the growth of their leaves initially but in 40-50 min growth resumed. This coincided with and was obviously due to a gradual increase in extensibility of the primary leaf suggested by changes in its extension rate, which was induced by adding a counterweight to inductive electromechanical position sensor. Specificity of gene probe for expansins was confirmed by sequencing cDNA and its comparison with literature data. Dot-blot analysis showed an increase in transcript level of expansin genes induced by PEG treatment. Thus gene-specific regulation of expansin mRNA pools likely contributes to fast adjustment of cell wall-loosening under conditions of water deficit. (c) 2005 Elsevier SAS. All rights reserved.
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