种子子指对棉株下部外围“铃-叶系统”生长及生理特征的影响  

Effects of Cotton Seed Index on Growth and Physiological Characteristics of Outside "Boll-Leaf System" on Lower Fruit Branch

作　　者：张海娜[1] 李存东[1] 孙红春[1] 陈文雪[1] 

机构地区：[1]河北农业大学农学院,河北保定071001

出　　处：《棉花学报》2006年第6期357-361,共5页Cotton Science

基　　金：国家自然科学基金(30370833);河北省自然科学基金(303179);河北省自然科学基金(C2006000436);高等学校博士学科点专项科研基金(20050086003)

摘　　要：以转Bt基因抗虫棉33B为材料,播前根据种子的大小和饱满度状况设三个子指处理,观测了棉花下部果枝外围果节铃及其对位叶的生长和生理特征。结果显示,大粒饱满的种子处理显著提高了该部位开花当天铃对位叶叶面积,还明显地促进了源叶生理质量的改善,且成熟时单铃子棉的干物重得到明显增加。小粒饱满比大粒不饱满的种子更明显地影响了该部位“铃-叶系统”的生长和生理状况,显著降低了成熟时的单铃子棉干物重。Using insect-resistant transgenic Bt（Bacillus thuringiensis）cotton 33B variety as material, growth and physiological characteristics of outside ＂boll-leaf system＂ on lower fruit branch were studied. This experiment was done at the teaching and experiment station of Agriculttal University of Hebei from 2003 to 2004. Three different kinds of cottonseeds, which based on seed index, were selected before sowing. They were large-size and plumpness, seed percent was 11.7-12.0 g （treat Ⅰ ） large-size and lower plumpness, seed percent was 10.2-10.9 g （treat Ⅱ ） small-size and plumpness, seed percent was 7.5-7.9 g （treat Ⅲ）. The results showed that large-size and plumpness seed was not only propitious to building larger leaf on flowering day, but also enhancing the physiological quality of source leaves and the dry weight of seed cotton per boll in mature stage. Effects of small-size and plumpness on growth and physiological status of outside ＂boll-leaf system＂ on lower fruit branch was more obviously than those of large-size and lower plumpness seed. Its dry boll weight was the least. So it would be very important to select large-size and plumpness cottonseeds before sowing in the field.

关 键 词：棉花 子指 下部果枝 外围果节 

分 类 号：S562[农业科学—作物学]