Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2014 Vol: 6 Issue: 1

Observation on the pistillate differentiation of Chestnut (Castanea) cultivar Ã?¢Ã?â?¬Ã?Ë?YanshanzaofengÃ?¢Ã?â?¬Ã?â?¢

Abstract

Chinese Chestnut (Castanea mollissima Blume.) is a widely distributed nut tree and well known for its ecological and economic value. Seed yield, the main factor determining Chinese chestnut production, is highly associated with flower development, especially with the number of female flowers. However, little effort has been devoted to the role of pistillate flower differentiation in this species. We tried to examined the female flower morphological characterization in chestnut cultivar ‘Yanshanzaofeng’ by light and scanning electron microscopy. The results showed that the time from the appearance of female inflorescence axis primordial to the maturity of pistil needed about two months in Qianxi county. Pistillate inflorescences were difficult to recognize from lateral bud primordia during their early development. The inflorescences expanded rapidly and produced individual pistillate flowers in early May. The process of pistillate differentiation could be divided into seven stages, which including pistillate initial differentiation stage, pistillate primordium differentiation stage, alabastrum primordium differentiation stage, stigma primordium differentiation stage, stigma elongation stage, ovary formation stage and the blooming stage. Based our results, we may spraye the plant growth regulator in late April, which could be promoted more female flowers differentiation in Chestnut (Castanea) cultivar ‘Yanshanzaofeng’.