甘蔗品种(种)贮藏蔗糖潜力与其生理特性间关系的研究

STUDIES ON THE RELATIONSHIP BETWEEN SUGAR-STORING POTENTIAL ABILITY AND PHYSIOLOGICAL CHARACTERS IN SUGARCANE VARIETIES (SPECIES)

研究了不同蔗糖贮藏潜力品种(种)的一些生理特性,结果表明蔗糖贮藏潜力大的商糖品种从伸长期至成熟期光合强度高于贮藏潜力中等和较低的中糖品种和低糖品种,在成熟期间,高糖品种的光合产物转移量比中、低糖品种大,高体蔗糖贮藏组织的主动吸糖和被动吸糖能力及AFS(％)值均为高糖品种大。贮藏细胞壁厚度及细胞间隙横切面积高糖品种大于低糖品种,成熟期的光合强度与蔗糖分含量呈显著正相关,整个成熟过程中光合产物转移量与蔗糖分表现为显著和极显著正相关,通径分析表明成熟初期的光合产物转移量和成熟期的光合强度对蔗糖分有较大的直接作用。 被动吸糖能力对藤糖分的直接贡献最大。

Some physiological characters of sugarcane varieties with different sugar-storing potential ability were studied.The resuls Indicated that the high quality varieties with high sugar-storing ability had the highest values of pholosynthesls from growing of stem enlogatton to maturing period.During maturing perold ,the tranaport rate of photosvnthesis product of high quality varieties wu higher than the both varlrlles with low and medium quality.The high quality varieties had the highest values in activity sucrose uptake,passive sucrose uptake and AFS (%) in sugarstoting tissue of stem in vitro.There was a signifcant positive correlation coefficient between photosynthesis and sugar-storing potential ability of cane.In primary maturity stage and maturity stage,statistically singificant and high significant correlations existed between transport rate of photosynthesis product and sugar-stouing potential ability of cane,respectively.Results of path analysis showed that transport rate of photosynthesis product in primaty maturity stage and maturity stage had directly greater contribution to sucrose of cane.The passive sucrose uptake of the tissue had the greatest contribution to sucrose content of cane.