HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Brown, R. H. Articles by Blaser, R. E. Search for Related Content PubMed Articles by Brown, R. H. Articles by Blaser, R. E. Agricola Articles by Brown, R. H. Articles by Blaser, R. E.

Effects of Leaf Age on Efficiency¹

In experiments with reed canarygrass, white clover, and alfalfa, efficiency of leaves of different ages was measured in terms of growth and CO₂ uptake. Reed canarygrass plants with upper leaves remaining grew more rapidly than those with lower leaves. Plants with only one bottom leaf remaining grew slower than completely defoliated plants. White clover plants with 1- or 2-week old leaves produced more dry matter and absorbed more CO₂ than plants with 3- or 4-week old leaves. Leaves taken from the bottom of alfalfa plants in a 4-week old stand were about half as efficient in CO₂ uptake as top leaves. Bottom leaves were light saturated at lower intensities than top leaves. Data presented in this paper indicate that leaf age is an important consideration in the manipulation of LAI for increased yields.

² Assistant Professor, Graduate Assistant, and Professor of Agronomy, respectively.

Received for publication September 30, 1965.

This article has been cited by other articles:

				A. G. Blundell and D. R. Peart High abscission rates of damaged expanding leaves: field evidence from seedlings of a Bornean rain forest tree Am. J. Botany, November 1, 2000; 87(11): 1693 - 1698. [Abstract] [Full Text]