镉胁迫对转基因棉花SGK3和ZD-90种子品质性状的影响

doi:10.3724/SP.J.1006.2011.00929

摘要/Abstract

摘要： 以陆地棉标准系TM-1为对照，通过盆栽模拟试验，采用ICP-MS技术和NIRS技术测定不同水平镉胁迫下2个棉花品种(系)种子种仁的镉含量和营养成分。结果表明，3个参试的棉花品种(系)种仁中的镉含量随镉处理浓度的增加而显著增加，其中转基因抗虫棉品种SGK3种子种仁的镉含量最高，低、中、高镉浓度处理后的种仁镉含量均显著高于其他品种(系)，说明该品种具有较强的镉累积能力。转基因抗草甘膦棉花种质系ZD-90种仁中的镉含量虽显著低于SGK3，但高于甚至显著高于陆地棉标准系TM-1。镉处理可降低棉花种子的物理品质性状，且品种(系)间的差异达到显著水平。3个陆地棉品种中，镉处理对于TM-1的蛋白质、油分和棉酚含量有较大的影响，差异达到了显著水平。而SGK3和ZD-90的种子种仁营养成分受镉处理影响相对较小，不同处理间种仁的营养成分差异未达显著水平。耐镉害能力为SGK3>ZD-90 >TM-1。相关性分析结果表明，棉花种子种仁的镉含量与棉酚含量呈显著负相关，但与其他种子物理品质性状和种仁营养品质性状的相关性未达显著水平。

关键词: 棉花, 镉胁迫, 物理品质性状, 营养品质性状

Abstract: A pot experiment was conducted to study the physical and nutritional quality traits of seeds in transgenic cotton SGK3 and ZD-90 under cadmium (Cd) stress, using TM-1 as the check. The results showed that the Cd content in the kernels of the three experimented cotton materials increased linearly with the increase of cadmium level treated. Among the materials used in the experiment, the Cd content in the kernels of SGK3 was higher significantly than those of others, which indicated that SGK3 was an outstanding cotton germplasm for accumulation of cadmium. In addition, Cd stress could reduce the physical and nutrient quality traits of cottonseeds significantly. According to the results of experiment, the resistance to Cd stress for the materials used in this experiment was in the order as: SGK3>ZD-90>TM-1.

Key words: Cotton, Cadmium stress, Physical quality traits, Nutritional quality traits

李玲, 陈进红, 祝水金. 镉胁迫对转基因棉花SGK3和ZD-90种子品质性状的影响[J]. 作物学报, 2011, 37(05): 929-933.

LI Ling, CHEN Jin-Gong, CHU Shui-Jin. Effects of Cadmium Stress on the Seed Quality Traits of Transgenic Cotton SGK3 and ZD-90[J]. Acta Agron Sin, 2011, 37(05): 929-933.

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