黄皮种子脱水敏感性与胚轴中可溶性糖含量的关系  

Relation Between Desiccation-tolerance and Soluble Sugar Content of Embryonic Axes in Clausena lansium Seeds

作　　者：陆旺金[1] 姜孝成[2] 金剑平 傅家瑞[4] 

机构地区：[1]华南农业大学园艺系,广州510642 [2]湖南师范大学生物系,长沙410081 [3]珠海市园艺研究所,珠海519070 [4]中山大学生物系,广州510275

出　　处：《植物生理学报（0257-4829)》2001年第2期114-118,共5页Acta Phytophysiologica Sinica

基　　金：国家自然科学基金 (3 9470 0 82 );广东省自然科学基金 (980 3 60 )资助项目

摘　　要：以典型的顽拗性种子黄皮为试材 ,研究了花后不同时间的种子、收获后萌发的种子及 15℃湿藏种子的脱水敏感性变化及其与种子胚轴中可溶性糖含量的关系。 15℃湿藏 15 0d及 6 0 0d使种子脱水敏感性增强 ,与寡糖含量下降以至消失及寡糖 /蔗糖 (O/D)之比下降极为一致 ,虽然花后 6 7d的种子耐脱水能力最强 ,但此时蔗糖、寡糖含量及寡糖 /蔗糖之比却并非最高。虽然 15℃湿藏 15 0d的种子萌发 4d最耐脱水 ,但寡糖含量及寡糖 /蔗糖之比在萌发 3d时均已降至0。结果表明 ,发育及萌发种子的脱水敏感性与蔗糖。Desiccation sensitivity and its relation to soluble sugars of embryonic axes were studied in seeds during their development, germinated seeds and moist storage seeds of wampee ( Clausena lansium (Lour.)Skeels). The results are as follows:1.Among seeds of 5 different developmental stages (60 DAA,67 DAA,74 DAA,81 DAA and 86 DAA; DAA:Days after anthesis),67 DAA seeds were most desiccation tolerant (Fig.1) , but the sugar content in their embryonic axes was not the highest (Table 2); 2.Lowering vigor index and increasing desiccation sensitivity of seeds during moist storage for 150 d and 600 d at 15℃ were correlated with higher sucrose content and lower oligosaccharides/sucrose(O/D ratio)(Tables 3,4);3. Seeds after moist storage for 150 d germinated for 4 d still showed desiccation tolerance, but oligosaccharides and O/D had declined to 0 after 3 d of germination (Table 5).The results indicate that: desiccation sensitivity of developing or germinated seeds are correlated with developmental stage and are not correlated with sugar content and O/D ratio .

关 键 词：黄皮 脱水敏感性 胚轴 可溶性糖 种子 

分 类 号：Q945[生物学—植物学]