板栗空苞机理的研究

板栗(Castanea mallissima Blume)空苞主要是在双受精作用完成后、初生胚乳细胞分裂为一团游离核,不再继续分裂,受精卵未能从胚乳细胞中得到发育所需的营养物质,处于停滞状态。空苞发生前后,空苞株与正常株的总苞及于房中可溶性蛋白质含量、过氧化氢酶活性、过氧化物酶同工酶谱,均有差异。试验表明,胚囊发育和双受精作用期及时供给外源多维营养元素能有效地控制板栗空苞的发生。

Mechanism of Formation of Empty-shell Chestnut for Chestnut Trees

Results from the present study illustrated that the empty-shell chestnuts were formed due to the cease of division of the primary endosperm nucleus, so the latter were unable to develop into normal endosperm, and that the fertilized ova were lacking in essential nutrients. It was estimated that the content of soluble protein and the activities of catalase and peroxide isozyme were lower in inyolucre and ovary of empty-shell chestnuts than in those of normal ones. Experiment proved that, nutrient application through leaf-spraying during the stages of early embryo sac, fertilization, and earlly embryogenesis was efficient for proventing the occurence of empty-shell chestnuts.