摘要
板栗和锥栗种子发育过程中内源ＡＢＡ含量逐渐上升，达到高峰时间是板栗开花后１０５天、锥栗开花后１００天，随后ＡＢＡ含量均逐渐下降。果实成熟采收时ＡＢＡ含量比高峰时小１０倍。随着种子发育，种子和胚对外加ＡＢＡ的敏感性也逐渐下降，１０－５ｍｏｌ／ＬＡＢＡ可以完全抑制开花后１００天的两个树种种子的发芽，但对成熟种子１０－２ｍｏｌ／ＬＡＢＡ亦不能抑制发芽。ＡＢＡ对成熟前期胚的贮藏蛋白质合成无影响，但能促进成熟中后期胚的贮藏蛋白质的积累作用，ＡＢＡ维持板栗和锥栗贮藏蛋白质合成和积累作用表现在转录水平上。
ABA contents increased obviously during the early developmental stages of C.mollissima and C.henryi seeds. The ABA contents of the seeds reached the peak of 1935ng/g at 105 days (C.mollissima) and 1573ng/g at 100 days (C.henryi) after flowering, then decreased gradually in both species. Moreover, the sensitivity to ABA of seeds and their isolated embryos decreased during development. The germination of two kinds of seeds 100 days after flowering inhibited by 15-5mol/L ABA, and failed to completely inhibit even by 10-2 mol/L ABA if the seeds harvested at full maturity. The effects of ABA in promoting the synthesis and accumulation of protein storage in embryos was at the transcriptional level, in the later process of mature.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1998年第4期1-7,共7页
Scientia Silvae Sinicae
基金
国家自然科学基金
关键词
板栗
锥栗
顽拗性种子
种子萌发
ABA
C.mollissima, C.henryi, Recalcitrant seed, Development, ABA, Storage protein
