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Amelioration of Chilling Injury in Rice Seedlings by Mefluidide 1
Author(s) -
Zhang L. X.,
Li P. H.,
Tseng M. J.
Publication year - 1987
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1987.0011183x002700030022x
Subject(s) - oryza sativa , biology , poaceae , rice plant , botany , acetamide , horticulture , biochemistry , astrobiology , gene
Rice ( Oryza sativa L.) seedlings at two to three leaf stage were used for testing mefluidide (/V‐[2,4‐dimethyl‐5‐[[(trifluoromethyl)‐ sulfonyl)amino]phenyl]acetamide) protection of chilled plants. After 8‐days exposure to 6°C, seedlings sprayed with 3, 5,10, and 15 mg mefluidide L −1 had 29,30,29, and 31% injury, respectively. Controls showed > 65% damage. During the 8‐day chilling period, consistent levels of about 30% electrolyte leakage were observed among the mefluidide‐treated plants, whereas controls showed an increase in leakage from 30 to 70%. It appears that mefluidide may alter plasma membrane properties and thus lead to increased tolerance to chilling stress. Significant protection was apparent 6 h after mefluidide treatment. Protection can last for at least 72 h after treatment. Chilled, mefluidide‐treated plants grew taller and flowered 5 to 10 days earlier than chilled controls. Although high concentrations of mefluidide can stunt plant growth, at concentrations of 5 to 10 mg L −1 rice plants did not exhibit any adverse growth and development characteristics. A 5 mg mefluidide L −1 application appeared to stimulate plant growth in a nonstressed environment.