Effects of Nitric Oxide on Postharvest Ripening and Le-ETR4 Expression of Tomato Fruit

ACTA HORTICULTURAE SINICA ›› 2010, Vol. 37 ›› Issue (8): 1257-1263.

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Effects of Nitric Oxide on Postharvest Ripening and Le-ETR4 Expression of Tomato Fruit

YANG Hu-qing，WU Feng-hua，and CHANG Yin-zi*

（School of Agriculture and Food Science，Zhejiang A & F University，Lin’an，Zhejiang 311300，China）

Received:2010-01-21 Revised:2010-04-14 Online:2010-08-25 Published:2010-08-25
Contact: CHANG Yin-zi

Abstract

Abstract: The effects of NO on postharvest ripening of breaking tomato fruit（Lycopersicon esculentum）were investigated using 50 μmol · L-1 SNP treatment for 30 min. Northern hybridization method was taken to detect the expression of Le-ETR4. The results indicated that dipping fruits in 50 μmol · L-1 SNP treatment for 30 min obviously reduced ethylene production rate, inhibited the activities of cellulase, polygalacturonase and ACC oxidase, and delayed color development and fruit softening. NO treatment also significantly repressed the expression of Le-ETR4. These results demonstrate that NO can inhibit activities of ripening-related enzymes through suppressing ethylene synthesis and expression of ethylene receptor gene. The ripening process of tomato can be regulated by NO both on a physiological and ethylene receptor level.

Key words: tomato, postharvest, ripening, nitric oxide, ethylene, Le-ETR4

CLC Number:

S 641.2

YANG Hu-qing;WU Feng-hua;and CHANG Yin-zi. Effects of Nitric Oxide on Postharvest Ripening and Le-ETR4 Expression of Tomato Fruit[J]. ACTA HORTICULTURAE SINICA, 2010, 37(8): 1257-1263.

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Effects of Nitric Oxide on Postharvest Ripening and Le-ETR4 Expression of Tomato Fruit

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