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Scientia Silvae Sinicae ›› 1998, Vol. 34 ›› Issue (4): 1-7.

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STUDIES ON THE ABA SENSITIVITY DURING THE DEVELOPMENT OF CASTANEA MOLLISSIMA AND C.HENRYI SEEDS

Yushan Zheng   

  1. Fujian Forestry College Nanping 353001
  • Received:1997-10-17 Online:1998-07-25 Published:1998-07-25

Abstract:

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 15-5 mol/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.

Key words: C.mollissima, C.henryi, Recalcitrant seed, Development, ABA, Storage protein