链霉菌和壳寡糖对辣椒幼苗生长发育的影响

为了探究链霉菌30702和壳寡糖对辣椒种子萌发和幼苗生长的影响，采用浸种方法和穴盘育苗法，研究了链霉菌（3个浓度水平）、壳寡糖（2个浓度水平）对辣椒出苗质量及幼苗形态和生理的影响。结果表明，采用链霉菌和壳寡糖浸种后，辣椒的出苗率、株高、茎粗、根长、叶面积、壮苗指数、总干质量、可溶性糖、可溶性蛋白等含量显著提高，萎蔫指数显著降低，影响程度随链霉菌使用浓度的增加而增大，且链霉菌的作用大于壳寡糖；链霉菌1.2×107 cfu·mL?1和壳寡糖100 g·L?1的复合处理的生长发育最佳，萎蔫指数最低，且此复合处理在主成分分析中的综合得分最高；交互作用分析结果表明，除总干质量和壮苗指数外，链霉菌和壳寡糖均有显著的交互作用。综合结果表明，链霉菌30702对辣椒的种子萌发有促进作用，有利于辣椒幼苗的生长，链霉菌与壳寡糖之间有交互效应。

Effects of Streptomyces 30702 and chitososaccharides on growth and development of seedlings in Pepper

To explore the effect of Streptomyces 30702 and chitososaccharides on seed germination and seedling growth in Pepper, 3 concentration levels of Streptomyces and 2 concentration levels of chitooligosaccharides were conducted to soak seeds and then cultivate seedlings in hole tray and study seedling quality and physiology. The result showed that after treatment with Streptomyces and chitooligosaccharides, emergence rate , plant height, stem thickness, root length, leaf area, seedling strongness index, total dry weight, soluble sugar and soluble protein were significantly improved, while wilting index was significantly reduced, the extent of influence increased as the using concentration of Streptomyces , Among them compound treatment of Streptomyces 1.2 × 107 cfu·mL?1 and chitosaccharide 100 g·L?1 grew best, wilting index lowest. After the principal component analysis, the compound treatment had the highest comprehensive score. Through interaction analysis, Streptomyces and chitooligosaccharides interacted significantly, except for the total dry weight and seedling strongness index. In a word, Streptomyces 30702 promotes seed to germinate and grow stronger than chitooligosaccharides, interact with chitooligosaccharides in pepper.