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Web URL(s): | http://www.graszaad.info/onderzoeksverslagen/Proceedings%20of%20the%207th%20IHSC.pdf#page=115 Last checked: 11/21/2014 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Proceedings |
Author(s): | Trethewey, J. T.;
Rolston, M. P.;
Chynoweth, R.;
McCloy, B. |
Author Affiliation: | Trethewey and Rolston: AgResearch Lincoln Research Centre; McCloy: NZ Arable, Christchurch; Chynoweth: Foundation for Arable Research, Lincoln, New Zealand |
Title: | Light, lodging and flag leaves - What drives seed yield in ryegrass? |
Meeting Info.: | Dallas, Texas: April 11-13, 2010 |
Source: | Proceedings of the 7th International Herbage Seed Conference. 2010, p. 104-108. |
Publishing Information: | s.l.: s.n. |
# of Pages: | 5 |
Keywords: | TIC Keywords: Growth regulator evaluation; Lolium perenne; Plant growth regulators; Seed production; Seed yield; Trinexapac-ethyl
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Abstract/Contents: | "The effect on seed yield components of reduced photosynthetic capacity of perennial ryegrass (Lolium perenne L.) was investigated. Firstly, seed yield responses to plant growth regulators were examined. Lodging during flowering and seed fill had a negative effect on seed yield. Days to 50% lodging is a good predictor of seed yield. Plant growth regulator responses from trinexapac-ethyl rates and timings can be explained by delays in the onset of lodging and improved photosynthetically active radiation (PAR) interception at the mid canopy level. Secondly, following flowering, photosynthetic capacity was reduced by defoliation or shading the flag leaf, stem, or head of individual ryegrass tillers. Reduced PAR to the flag leaf and stem did not affect thousand seed weight or seed yield when compared with control plants whereas reducing PAR to the head had a significant effect. The seed head itself may be a more important source of carbohydrate than the flag leaf during seed fill." |
Language: | English |
References: | 8 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Trethewey, J. T., M. P. Rolston, R. Chynoweth, and B. McCloy. 2010. Light, lodging and flag leaves - What drives seed yield in ryegrass?. p. 104-108. In Proceedings of the 7th International Herbage Seed Conference. Dallas, Texas: April 11-13, 2010. s.l.: s.n. |
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