子叶损伤对苦豆子幼苗早期生长的影响

发布时间：2018-04-13 01:29

本文选题：苦豆子 + 幼苗　；参考：《草业学报》2017年08期

【摘要】：为探讨子叶损伤对新疆伊犁河谷常见的本土恶性入侵植物苦豆子幼苗早期生长发育的影响,在实验室人工气候箱盆播条件下,研究了不同程度子叶切除处理(切除0.5、2×0.5、1、1.5和2片子叶,以不切除子叶为对照)对苦豆子幼苗早期生长的影响。结果表明,子叶切除的程度对幼苗的死亡率、株高和叶面积均影响显著;高强度处理下,幼苗的主根长与对照及低强度处理组间无显著差异,而侧根数和侧根长则均显著低于对照组及低强度处理组。即使是低强度的子叶切除,苦豆子幼苗的茎、叶生物量以及幼苗的总生物量均会受到不同程度的抑制,而根生物量和根冠比受影响较小;子叶切除对幼苗各构件的生物量分配的影响表现为:茎的生物量分配不受影响,根的显著提高,而叶则受到不同程度的抑制。结果表明,子叶损伤是苦豆子幼苗建成的瓶颈。
[Abstract]:In order to study the effect of cotyledon injury on the early growth and development of kudzu seedlings, a common indigenous malignant invasive plant in Yili River Valley, Xinjiang, under the conditions of laboratory artificial climate box seeding,The effects of cotyledon excision (1. 5 and 1. 5 and 2 cotyledons) on the early growth of Sophora alopecuroides seedlings were studied.The results showed that the degree of cotyledon excision had a significant effect on the mortality, plant height and leaf area of seedlings, but there was no significant difference between the main root length of seedlings under high intensity treatment and the control and low intensity treatments.The number of lateral roots and the length of lateral roots were significantly lower than those of control group and low intensity treatment group.Even with low intensity cotyledon removal, the stem, leaf biomass and total biomass of Sophora flavescens seedlings were inhibited to some extent, while the root biomass and root / shoot ratio were less affected.The effect of cotyledon removal on biomass allocation of seedling components was as follows: stem biomass allocation was not affected, root was significantly increased, and leaves were inhibited to varying degrees.The results showed that the damage of cotyledon was the bottleneck of the seedling formation of Sophora alopecuroides.
【作者单位】：伊犁师范学院生物与地理科学学院;新疆自治区普通高校天然产物化学与应用重点实验室;伊犁师范学院化学与环境科学学院;江苏衡谱分析检测技术有限公司;
【基金】：国家自然科学基金项目(31360101) 新疆青年科技创新人才培养工程(qn2015yx021)资助
【分类号】：S812.6

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