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| Web URL(s): | https://academic.oup.com/aob/article/63/3/349/193023/
Last checked: 02/27/2017
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Kemp, D. R.;
Eagles, C. F.;
Humphreys, M. O. |
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| Author Affiliation: | IGAP Welsh Plant Breeding Station, Wales |
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| Title: | Leaf Growth and Apex Development of Perennial Ryegrass During Winter and Spring. |
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| Source: | Annals of Botany. Vol. 63, No. 3, March 1989, p. 349. |
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| Publishing Information: | London, Oxford University Press |
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| Keywords: | TIC Keywords: Growth; Vernalization; Initiation; Flowering; Lolium perenne
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| Abstract/Contents: | "The relationship between rates of leaf extension, leaf appearance, and primordia production on the apex were studied in the field during winter and spring in established swards of four contrasting perennial ryegrass lines (Aurora, Melle, a hybrid selection from a cross between Aurora and Melle and S.24). All four lines showed an increase in leaf extension rates which commenced when spikelet primordia were first initiated at the apex. This was some time after vernalization requirements had been satisfied. In early-flowering lines the stimulus to leaf growth rates occurred earlier than in late-flowering lines. Maximum leaf growth rates occurred about the time of double ridge formation, in the middle of the period of spikelet primordia production. The rate and duration of the period of spikelet primodia production varied between lines. By the time of flowering, leaf growth rates declined to values recorded for vegetative plants in the winter. Leaf appearance rates followed a similar pattern to leaf growth rates, although the increase in leaf appearance rate was less than in primordia production or leaf growth rates. Hybrids from a cross between early- and late-flowering lines showed early enhancement of leaf extension rates due to early initiation of spikelet primordia production. These high rates of leaf growth were maintained for longer, compared with the early-floering line, as the duration of spikelet production was longer. This illustrates a mechanism for combining early spring growth with lateness of flowering in ryegrass breeding programmes." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kemp, D. R., C. F. Eagles, and M. O. Humphreys. 1989. Leaf Growth and Apex Development of Perennial Ryegrass During Winter and Spring.. Ann. Bot. 63(3):p. 349. |
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| Web URL(s):
https://academic.oup.com/aob/article/63/3/349/193023/
Last checked: 02/27/2017
Requires: PDF Reader |
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MSU catalog number: QK 1 .A53 |
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