甜瓜生长发育过程中品质动态变化规律

Dynamic Variation of Quality in the Development of Melon Fruits

以"西州密25号"甜瓜为试材,利用外部形态观测和内部生理指标相结合的方法,研究了果实的生长动态、果肉可溶性糖、可溶性蛋白质、维生素C、有机酸含量、甜度及果肉硬度的变化,并对果肉的主要品质进行了相关性分析,为甜瓜品质的提高及最佳采收期提供参考依据。结果表明:甜瓜果实纵、横径和单果质量生长发育动态呈"快-慢-快"的S型生长曲线;果实成熟期蔗糖、葡萄糖和果糖是主要的可溶性糖,随着果实的成熟可溶性固形物含量、甜度、维生素C含量呈上升趋势;可溶性蛋白质和有机酸含量在发育初期较高,之后下降至成熟趋于平缓。相关分析表明,蔗糖的积累在"西州密25号"品质的形成过程中起到至关重要的作用。

The melon‘Xizhoumi 25’was used to study the melon growth and development process of fruit quality and dynamic patterns,the changes of the fruit those dynamic growth,dissolubility sugar,soluble protein,acid,vitamin C content and the intensity were measured with the method of combining the external morphological character and the internal physiological and biochemical changes,and the correlations between main quality of the fruit were also analyzed,so as to provide the basis for improvement of fruit quality and ascertain the best harvest time of fruit.The results showed that the transverse diameter,vertical diameter and fruit weight presented‘slow-fast-slow’of S growth curve.The soluble sugar in‘Xizhoumi 25’fruit mainly included sucrose,glucose,and fructose.While the maturity of the melon fruit those soluble solid,sweetness and vitamin C content were increasing,but at primary stage of the growth of soluble protein and organic acid content were relatively high,while the maturity of the melon fruit that soluble protein and organic acid content were decreased less after mature fell to flatten out.Correlation analysis showed that the sucrose plays a crucial role in quality forming process of‘Xizhoumi 25’.