A Study on the Involvement of Nitric Oxide in Inhibiting Pollen Tube Growth of Tea Plant（Camellia sinensis）Under Low-temperature

ACTA HORTICULTURAE SINICA ›› 2013, Vol. 40 ›› Issue (8): 1535-1540.

• Other Horticulture Plants • Previous Articles Next Articles

A Study on the Involvement of Nitric Oxide in Inhibiting Pollen Tube Growth of Tea Plant（Camellia sinensis）Under Low-temperature

WANG Wei-dong1，JIANG Xin1，DU Yu-lin1，WANG Yu-hua1,2,*，and LI Xing-hui1,2,*

（1Tea Research Institute，Nanjing Agricultural University，Nanjing 210095，China； 2The Post-Doctoral Research Station for Tea Science of Jiangsu Province，Suzhou，Jiangsu 215128，China）

Received:2013-03-28 Online:2013-08-25 Published:2013-08-25

Abstract

Abstract: The pollen germination and pollen tube growth of tea plant，as well as their relationship with nitric oxide（NO）under low-temperature were studied using pollen of culivar‘Longjing 43’. The results showed that low-temperature significantly inhibited the tea pollen germination and pollen tube growth in a time-dependent manner. Similar inhibitory effects in a dose-dependent manner were observed with exogenous NO donor（Sodium Nitroprusside，SNP）. Both NO scavenger（cPTIO）and nitric oxide synthase（NOS）inhibitor（L-NNA）partially alleviated this inhibitory effect. Furthermore，the NO releasing along with the NOS activity were promoted in tea pollen tubes under low-temperature. The results indicated that the inhibitory effects of low-temperature treatment on tea pollen germination and pollen tube growth are related to NO generating from NOS activity.

Key words: tea plant, low-temperature, pollen germination, pollen tube growth, nitric oxide

WANG Wei-dong1，JIANG Xin1，DU Yu-lin1，WANG Yu-hua1,2,*，and LI Xing-hui1,2,* . A Study on the Involvement of Nitric Oxide in Inhibiting Pollen Tube Growth of Tea Plant（Camellia sinensis）Under Low-temperature[J]. ACTA HORTICULTURAE SINICA, 2013, 40(8): 1535-1540.

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A Study on the Involvement of Nitric Oxide in Inhibiting Pollen Tube Growth of Tea Plant（Camellia sinensis）Under Low-temperature

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