摘要
以锥栗不同品系为材料,对其花粉粒大小、花粉量进行观测,以及不同花期、不同枝梢、不同贮藏条件、不同培养条件下花粉萌发率进行测定。结果表明:不同品系花粉粒大小及形态、花粉量、生活力存在差异,其中,1号、24号花粉量较大,生活力高,适宜作为授粉树品种;锥栗盛花期的花粉萌发率远高于初花期及末花期,且雄花枝上的花粉萌发率显著高于结果枝;4~7℃低温干燥贮藏能显著延长锥栗花粉生活力;5.0%~7.5%的蔗糖、400~900 mg/kg的硼酸溶液最适宜于锥栗花粉萌发,且花粉萌发的最适宜温度为30~35℃。因此,在生产上可于锥栗盛花期,选择温度较高的晴朗天气,喷施400~900 mg/kg的硼酸溶液,以促进花粉萌发,提高坐果率,减少空苞。
Size and quantity of pollen were measured, and germination rate of pollen at different flowering stage, branches, storage and culture conditions were determined for different cultivars of Castanea henryi. The results showed that there were differences existed in size, morphology, quantity and viability of pollen among different cultivars, and the pollen quantity and viability of No.1 and No.24 were higher, which were suitable for pollination trees. The pollen germination rate in full bloom was much higher than that in initial and end flowering, and the germination rate of pollen from male branch was significantly higher than that from bearing branch. Low temperature with 4-7 ℃ and drying storage condition could prolong the pollen viability. The concentration of sucrose at 5.0%-7.5%, and the concentration of boric acid at 400-900 mg/kg were greatly suitable for pollen germination, and the most suitable temperature for that were from 30 ℃ to 35 ℃. The study suggests that, we should choose sunny weather with higher temperature and spray the boric acid with concentration of 400-900 mg/kg at full flowering stage on production, to promote pollen germination, improve fruit-set rate, and reduce the empty shell.
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2017年第1期42-48,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
国家“十二五”科技支撑专题项目(2013BAD14B0403)资助
浙江省科技厅重大项目(2016C02056-6)资助
关键词
锥栗
花粉
形态
贮藏性
生活力
Castanea henryi, pollen, morphology, storage-ability, viability
