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標題: Effect of Temperature on the Fruiting of Poinsettia
作者: 楊梨玲
Li-Ling Yang
Chien-Young Chu
關鍵字: Euphorbia pulcherrima Willd. ex Klotzch.;聖誕紅;pollen;seeds;breeding;花粉;種子;育種
Project: 興大園藝, Volume 24, Issue 1, Page(s) 53-70.
Horticulture NCHU, Volume 24, Issue 1, Page(s) 53-70.

Pollens germination was affected by temperature. Under the temperature of 15℃, pollens did not germinate. The optimum temperature for most of poinsettia pollen germination was at 23℃. Not only had the highest pollen germination rate but seeds harvested of poinsettia cultivars occurred in ‘Garden cultivar',‘Eckespoint Freedom'and ‘Eckespoint Lilo Red'. On the other hand, the lowest of that occurred in‘Annette Hegg Diva Starlight'and ‘Petoy'. The most difficult for breeding was on ‘Jacobsen Petersta', it had few pollens and the pollen did not germinate on style. The successful pollination was also around 23℃. Pollen tube of a successful pollination entered ovule after the 3-5th day. the speed of pollen tube growth related to temperature. The rate of fruit set in the second winter was eighteen times than the first winter, as well as the average temperature was 2-3℃ higher than the first winter. The rate of fruit set was higher when the average temperature was at 23℃ from pollination to the 5th day after.
ISSN: 0255-5921
Appears in Collections:第24卷 第01期

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