Respiration in mature leaves of Lolium perenne as affected by nutrient supply, cutting and competition

C. J. Pilbeam; M. J. Robson; H. Lambers

doi:10.1111/j.1399-3054.1986.tb01232.x

Respiration in mature leaves of Lolium perenne as affected by nutrient supply, cutting and competition

C. J. Pilbeam, M. J. Robson, H. Lambers

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The rate of oxygen uptake was measured on sections of mature leaf tissue derived from two populations of Lolium perenne L. cv. S23, selected for contrasting rates of mature leaf respiration. Under conditions of sufficient nutrient supply, GL72 had a lower rate of respiration and a greater yield than GL66. The populations were exposed to important management variables to investigate their effect on the selection criterion, the two variables being nutrient supply and defoliation. Conditions of low nutrient supply were characterized by a similarity in respiration rate and a change in the regulation of respiration. Enzyme levels, rather than adenylates, controlled respiration. Weekly cutting induced activity of the otherwise latent alternative pathway.

Original language	English
Pages (from-to)	53-57
Number of pages	5
Journal	Physiologia Plantarum
Volume	66
Issue number	1
DOIs	https://doi.org/10.1111/j.1399-3054.1986.tb01232.x
Publication status	Published - 1 Jan 1986
Externally published	Yes

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abstract = "The rate of oxygen uptake was measured on sections of mature leaf tissue derived from two populations of Lolium perenne L. cv. S23, selected for contrasting rates of mature leaf respiration. Under conditions of sufficient nutrient supply, GL72 had a lower rate of respiration and a greater yield than GL66. The populations were exposed to important management variables to investigate their effect on the selection criterion, the two variables being nutrient supply and defoliation. Conditions of low nutrient supply were characterized by a similarity in respiration rate and a change in the regulation of respiration. Enzyme levels, rather than adenylates, controlled respiration. Weekly cutting induced activity of the otherwise latent alternative pathway.",

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N2 - The rate of oxygen uptake was measured on sections of mature leaf tissue derived from two populations of Lolium perenne L. cv. S23, selected for contrasting rates of mature leaf respiration. Under conditions of sufficient nutrient supply, GL72 had a lower rate of respiration and a greater yield than GL66. The populations were exposed to important management variables to investigate their effect on the selection criterion, the two variables being nutrient supply and defoliation. Conditions of low nutrient supply were characterized by a similarity in respiration rate and a change in the regulation of respiration. Enzyme levels, rather than adenylates, controlled respiration. Weekly cutting induced activity of the otherwise latent alternative pathway.

AB - The rate of oxygen uptake was measured on sections of mature leaf tissue derived from two populations of Lolium perenne L. cv. S23, selected for contrasting rates of mature leaf respiration. Under conditions of sufficient nutrient supply, GL72 had a lower rate of respiration and a greater yield than GL66. The populations were exposed to important management variables to investigate their effect on the selection criterion, the two variables being nutrient supply and defoliation. Conditions of low nutrient supply were characterized by a similarity in respiration rate and a change in the regulation of respiration. Enzyme levels, rather than adenylates, controlled respiration. Weekly cutting induced activity of the otherwise latent alternative pathway.

KW - Alternative respiratory pathway

KW - cytochrome pathway

KW - perennial ryegrass

KW - selection lines

KW - yield

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Respiration in mature leaves of Lolium perenne as affected by nutrient supply, cutting and competition

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