The effects of temperature upon seed development in three species of forage grasses | Effects of temperature upon seed development in three species of forage grasses [Lolium multiflorum, Lolium perenne, Festuca pratensis]
1977
Akpan, E.E.J. | Bean, E.W.
The effects of three temperature regimes, 25 °C day/20 °C night, 20 °Cday/15 °C night and 15 °Cday/10 CC night upon seed development in S.22 Italian ryegrass, S.24 perennial ryegrass, S.215 meadow fescue and a Swiss ecotype of meadow fescue were investigated. The largest ovaries and largest seeds were obtained from the 15/10 °C environment and floret fertility was greatest at 20/15 °C. The largest seed weight per inflorescence was at 20/15 °C, except for the Swiss ecotype of meadowfescue where it was greatest at 15/10 °C. The percentage germination was highest from those seeds developed at 25/20 °C and this was particularly marked at germination temperatures of 13-20 °C. There was a low rate of germination of seeds from the 15/10 °C treatment, but they produced seedlings with the largest dry weights. It is concluded that year to year temperature differences will affect the yield and quality of seed crops of forage grasses.
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