Temperature response of photosynthesis in different drug and fiber varieties of Cannabis sativa L.

被引：34

作者：

Chandra S. ^{[1
]}

Lata H. ^{[1
]}

Khan I.A. ^{[1
,2
]}

ElSohly M.A. ^{[1
,3
]}

机构：

[1] National Center for Natural Product Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University

[2] Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University

[3] Department of Pharmaceutics, School of Pharmacy, University of Mississippi, University

来源：

Physiology and Molecular Biology of Plants | 2011年 / 17卷 / 3期

基金：

美国国家卫生研究院;

关键词：

Cannabis sativa; Internal CO[!sub]2[!/sub] concentration; Photosynthesis; Stomatal conductance; Temperature response; Transpiration; Water use efficiency;

D O I：

10.1007/s12298-011-0068-4

中图分类号：

学科分类号：

摘要：

The temperature response on gas and water vapour exchange characteristics of three medicinal drug type (HP Mexican, MX and W1) and four industrial fiber type (Felinq 34, Kompolty, Zolo 11 and Zolo 15) varieties of Cannabis sativa, originally from different agro-climatic zones worldwide, were studied. Among the drug type varieties, optimum temperature for photosynthesis (Topt) was observed in the range of 30-35 °C in high potency Mexican HPM whereas, it was in the range of 25-30 °C in W1. A comparatively lower value (25 °C) for Topt was observed in MX. Among fiber type varieties, Topt was around 30 °C in Zolo 11 and Zolo 15 whereas, it was near 25 °C in Felinq 34 and Kompolty. Varieties having higher maximum photosynthesis (PN max) had higher chlorophyll content as compared to those having lower PN max. Differences in water use efficiency (WUE) were also observed within and among the drug and fiber type plants. However, differences became less pronounced at higher temperatures. Both stomatal and mesophyll components seem to be responsible for the temperature dependence of photosynthesis (PN) in this species, however, their magnitude varied with the variety. In general, a two fold increase in dark respiration with increase in temperature (from 20 °C to 40 °C) was observed in all the varieties. However, a greater increase was associated with the variety having higher rate of photosynthesis, indicating a strong association between photosynthetic and respiratory rates. The results provide a valuable indication regarding variations in temperature dependence of PN in different varieties of Cannabis sativa L. © 2011 Prof. H.S. Srivastava Foundation for Science and Society.

引用

页码：297 / 303

页数：6

共 37 条

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