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Effects of elevated temperature on transportation and distribution of ~(14)C-salicylic acid in grape seedlings

Wang Lijun, Huang Weidong, Yu Fengyi

China Agricultural University,Chinese Academy of Agricultural Sciences.Beijing 100094；China

Abstract

All leaves except 4th, 5th, 6th, 7th and 8th ones of grape seedlings were cut off. The sixth leaves labeled with SA were subjected to an elevated temperature of 38deg C or normal temperature 27deg C 1, 3, 6, 12 h whie the other parts of seedlings were at 27deg C. The results showed that ~(14)C-SA was transported out less at 38deg C than at 27deg C. We proposed that SA was the signal of heat stress. ~(14)C-SA was transported either downwards or upwards at 38deg C or at 27deg C, primarily downwards, but ~(14)C-SA was transported less both downwards and upwards at 38deg C than 27deg C. ~(14)C-SA was distributed mostly in root at 1, 3, 6 h, mostly in stem at 12 h, but at 38deg C, mostly in root at 1 h or at 3 h, mostly in stem at 6 h or at 12 h. The ~(14)C-SA distribution to leaf or stem parts of the same location at 38deg C was different with 27deg C, morever, at both 38deg C and 27deg C, it was distributed nearly.

Key words: Elevated temperature;Salicylic acid;Transportation;Distribution

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Citing This Article：

Wang Lijun, Huang Weidong, Yu Fengyi. Effects of elevated temperature on transportation and distribution of ~(14)C-salicylic acid in grape seedlings. Acta Physiol Sin 2001; 53 (2): (in Chinese with English abstract).