Rapid and straightforward estimates of photosynthetic characteristics using a portable gas exchange system

被引：52

作者：

Parsons, R ^{[1
]}

Weyers, JDB ^{[1
]}

Lawson, T ^{[1
]}

Godber, IM ^{[1
]}

机构：

[1] Univ Dundee, Dept Biol Sci, Dundee DD1 4HN, Scotland

来源：

PHOTOSYNTHETICA | 1997年 / 34卷 / 02期

关键词：

conductance; infra-red gas analysis; irradiance; photorespiration; photosynthesis; portable IRGA; P(N)/C(i); respiration; stomata;

D O I：

10.1023/A:1006800909651

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Procedures are described for estimating photosynthetic characteristics using a portable infra-red gas analysis (IRGA) system. Once the effects of stomatal limitation on CO(2) assimilation have been established, up to ten parameters of photosynthesis can be estimated for a single leaf within 2 h, including: photosynthetic efficiency and capacity on both photon and CO(2) bases; compensation irradiances and CO(2) compensation concentrations; and light and dark respiration rates. These measurements can be made in the laboratory, glasshouse or field with relative ease. Methods for obtaining near instantaneous ("snapshot") measurements of leaf photosynthesis are also described, using carefully pre-set conditions within the leaf cuvette. Representative results are shown for Phaseolus vulgaris L. Important aspects of the procedure's experimental design, assumptions made in the analysis, and limitations of this approach are analysed.

引用

页码：265 / 279

页数：15

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