TITLE	NaCl stress in rice seedlings: starch mobilization and the influence of gibberellic acid on seedling growth
AUTHOR	Chuan Chi Lin Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China Ching Huei Kao Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China
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ABSTRACT	The growth of shoots and roots of rice (Oryza sativa L., cv. Taichung Native 1) seedlings was significantly inhibited when the seeds were subjected to NaCl stress. NaCl markedly decreased the mobilization of starch in endosperm. Results also showed that a-amylase activities in endosperm were reduced when rice seeds were germinated in the presence of NaCl. NaCl-inhibition of a-amylase activities was counteracted by gibberellic acid (GA3). GA3 reduced NaCl-inhibition of shoot growth, but not of root growth. Sugars (sucrose, fructose, and glucose) were able to reduce NaCl-induced growth inhibition of shoots and roots. The possible mechanism by which shoot growth and root growth in NaCl media respond differently to GA3 is discussed.
KEYWORD	a-Amylase; Gibberellic acid; NaCl; Oryza sativa L.; Starch mobilization;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 36 Number 3 July 1995, page 169-173, 5 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China