COMPARISON OF WATER-USE EFFICIENCY AND INTERNAL LEAF CARBON-DIOXIDE CONCENTRATION IN JUVENILE LEAVES AND PHYLLODES OF ACACIA-KOA (LEGUMINOSAE) FROM HAWAII, ESTIMATED BY 2 METHODS

被引：19

作者：

HANSEN, D ^{[1
]}

STEIG, E ^{[1
]}

机构：

[1] UNIV WASHINGTON, QUATERNARY RES LAB, SEATTLE, WA 98195 USA

来源：

AMERICAN JOURNAL OF BOTANY | 1993年 / 80卷 / 10期

关键词：

D O I：

10.2307/2445539

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

To gain further insight into comparative ecophysiology of different leaf types, water-use efficiency (WUE) and internal leaf carbon dioxide concentration (C(i)) were estimated in the field for juvenile leaves and phyllodes of Acacia koa by carbon dioxide and water vapor exchange using a closed system infrared gas analyzer and humidity sensor, and by deltaC-13 measurements. Both methods indicate that phyllodes possessed higher WUE and lower C(i) than juvenile leaves. However, C(i) predicted by deltaC-13 for juvenile leaves and phyllodes was lower than the average gas exchange estimated values of C(i) and closer to minimal ps exchange estimated values of C(i). It is suggested that deltaC-13 may be influenced more during times of maximal assimilation and leaf expansion than during maintenance.

引用

页码：1121 / 1125

页数：5

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