摘要:
为探讨特晚熟龙眼立冬本果实的发育过程,采用不同时期鲜、干重测定法,对立冬本龙眼全果和各组织鲜、干重变化动态及水分、溶质的需求和分配进行了研究,结果表明:立冬本龙眼果实及各部组织以鲜重、干重表示的生长型均为单“S”型;果皮鲜重、干重随果实发育而逐渐地增大,果实成熟时仍在上升;假种皮的形成和幼胚的出现时间相近,但干物质的积累则落后于胚;果实发育前期水分、溶质主要供给果皮、果核的生长,后期重点供应假种皮的迅速生长;成熟果实中,水分分配给假种皮的比例最高,溶质则在种子内占的比例最大。
关键词:
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龙眼 /
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立冬本 /
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果实 /
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水分 /
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溶质
Abstract:
In order to explore the fruit development of extremely late maturing Longan species(Lidongben),the dynamic changes of fresh and dry weight,as well as the distribution of moisture and solute content in whole fruit or different parts of fruit were analysed by measurement of fruit weight at various maturing periods.The results showed that,the fresh and dry weight of peel increased with the development of fruit;the formation of aril and emergence of embroy occured in the approximately same period,however,the rapidly increasing period of dry matter accumulation in aril occured when the dry matter accumulation in embroy reached the peak period.The water and solute content at early fruit developing period mainly went into peel and kenel but it come to aril at the late period.In matured fruits,the highest water content was distributed to arils and the highest solute content was to the seeds.
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