油木奈 果实生长发育机制初步研究

以成年油（木奈）树为材料,对其果实生长发育过程中果实的生长发育模式、可溶性碳水化合物的流入与内源CTKs、ABA的关系进行了研究.结果表明,可溶性碳水化合物（果糖、葡萄糖、蔗糖和山梨醇）在油（木奈）实中累积依果实不同的生长发育阶段而呈有特征性的变化并与之密切相关.随着果实进入第一换期讯速生长期,其含量尤其果糖和葡萄糖亦显著上升,而在硬核期,其含量又有所下降.在硬核期的后期,可溶性碳水化合物再次大量累积;随着油（木奈）实生长速率的上升,其含量迅速下降;当果实进入第二讯速生长期直至向成长期转变时,可溶性碳水化合物亦快速累积.内源CTKs、ABA的研究表明,ZRs、ABA与果实的第一期迅速膨大及可溶性碳水化合物的累积密切相关;diH]ZRs、ZRs与启动果实的第二次迅速膨大有关;ABA与果实的第二次迅速膨大及可溶性碳水化合物在果实中的累积呈正相关.文中就油（木奈）果实生长以及品质发育及其内源CTKs、ABA的调控机制进行了讨论.

Studies on the Mechanism of Fruit Growth in Nai (Prunus salicina Lindl var.)

Some aspects related to fruit growth and development of "Younai" (Prunus salicina Lindl var. cordata J Y Zhang et al) were studied, and the results showed as follows. The accumulations of soluble carbohydrates (including fructose, glucose, sorbitol and sucrose) in flesh showed their characteristic patterns in different special phase of fruit growth. In the initial rapid growth stage, the concentrations of soluble carbohydrates increased rapidly and paralleled the peak of growth rate, then decreased relatively during retarded growth phase. At the later stage of retarded growth, the soluble carbohydrates were accumulated markedly and then decreased with the increasing of the growth rate. When fruit, its growth rate increased at a second time and then went into maturation, the concentrations of soluble carbohydrates, especially of fructose and glucose, increased rapidly. The fluctuations of different endogenerous hormone showed their own special features, during the growth and development of fruit. Endogenerous ZRs and ABA were positively correlated to the first peak of growth rate and accumulation of soluble carbohydrates, but diH]ZRs held a low level at this stage. The concentrations of CTKs (mainly diH]ZRs) increased markedly and the peaks paralleled the soluble carbohydrates at the later stage of retarded growth, which suggested that cytokinins probably triggered the subsequent rapid growth of pericarp. ABA was correlated to the subsequent rapid growth and the accumulation of soluble carbohydrates (especially fructose glucose). Mechanism of fruit growth and development in Nai and its correlation to CTKs and ABA were discussed in this paper