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| Web URL(s): | https://academic.oup.com/aob/article/70/4/365/181267/
Last checked: 03/01/2017
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Pilbeam, C. J. |
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| Author Affiliation: | AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead, Berkshire |
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| Title: | Effect of nitrogen supply on the growth and senescence of leaves of Lolium perenne with contrasting rates of leaf respiration |
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| Source: | Annals of Botany. Vol. 70, No. 4, October 1992, p. 365-370. |
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| Publishing Information: | London, Oxford University Press |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Lolium perenne; Leaves; Vertical shoot growth; Nitrogen; Senescence; Respiration rate
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| Abstract/Contents: | "Respiration rates remain high during senescence which is an energy demanding process. Different rates of senescence may explain the contrasting respiration rates of mature leaves of two populations of perennial ryegrass cv. S23. This hypothesis was tested by measuring the lengths of elongating and senescing leaves of plants of two populations (GL72, a slow and GL66, a fast respiring population) for 76 d following the transplantation of the seedlings into soil-filled pots in a growth room. Nitrogen was supplied at two different rates at the beginning of the experiment and again at day 36. At high levels of nitrogen supply the slow respiring population had a faster elongation rate and so a greater leaf length than the fast respiring population. There was no difference between them in the rate of leaf senescence or in the duration of leaf growth. Consequently, the fast respiring population is considered profligate in its use of carbon. By contrast, under low nitrogen supply both elongation senescence rates were higher in the fast respiring population, although there was no difference in final leaf length. Therefore the longevity of leaves of the fast respiring population was reduced. It is argued that the leaves of the fast respiring population may turn-over minerals more rapidly than those of the slow, which may be more advantageous in conditions of low nitrogen supply and offset the benefits of a more conservative use of carbon normally seen under conditions of high nitrogen supply." |
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| Language: | English |
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| References: | 24 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pilbeam, C. J. 1992. Effect of nitrogen supply on the growth and senescence of leaves of Lolium perenne with contrasting rates of leaf respiration. Ann. Bot. 70(4):p. 365-370. |
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| Web URL(s):
https://academic.oup.com/aob/article/70/4/365/181267/
Last checked: 03/01/2017
Requires: PDF Reader |
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MSU catalog number: QK 1 .A53 |
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