The Photosynthetic Characters of Alocasia odora C. Koch. and Camelliajaponica L. in Greenhouse in Summer

ACTA HORTICULTURAE SINICA ›› 2002, Vol. 29 ›› Issue (5): 457-461.

• 研究论文 • Previous Articles Next Articles

The Photosynthetic Characters of Alocasia odora C. Koch. and Camelliajaponica L. in Greenhouse in Summer

Zhao Shiwei¹, Liu Donghuan², Liu Yujun², Zhang Zuoshuang¹, and Gao Rongfu²

(¹ Beijing botanical garden , Beijing 100093 , China ;　²Biological College of Beijing Forestry University , Beijing 100083 , China)

Received:1900-01-01 Revised:1900-01-01 Online:2002-10-25 Published:2002-10-25

Abstract

Abstract: The effect of higher temperature on net photosynthetic rates (Pn) of Alocasia odora C. Koch. and Camellia japonica L. leaves was investigated , which showed that Pn decreased under higher temperature and Pn in
Alocasia odora C. Koch. decreased slightly. It was found that Pn decrease wasn’t inhibited under ruling out stomata restriction. It was also found that carboxylation efficiency and maximum RuBP regeneration rate declined
above optimal temperature , and the maximum RuBP regeneration rate declined seriously. Photorespiration at higher temperature increased. Therefore , we suggest : 1) Alocasia odora C. Koch. has better adaptation to higher temperature and Camellia japonica is sensitive to higher temperature ; 2) Pn decrease at higher temperature is
mainly caused by no2stomata restriction and maximum RuBP regeneration rate decline may be the main restriction factor ; 3) photorespiration may also be one of the reasons resulting in Pn decrease.

Key words: Higher temperature, Net photosynthetic rate, RuBP carboxylation efficiency, RuBP regeneration rate, Photorespiration

CLC Number:

S 68

Zhao Shiwei;Liu Donghuan;Liu Yujun;Zhang Zuoshuang;and Gao Rongfu. The Photosynthetic Characters of Alocasia odora C. Koch. and Camelliajaponica L. in Greenhouse in Summer[J]. ACTA HORTICULTURAE SINICA, 2002, 29(5): 457-461.

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The Photosynthetic Characters of Alocasia odora C. Koch. and Camelliajaponica L. in Greenhouse in Summer

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