子叶损伤对苦豆子幼苗早期生长的影响

doi:10.11686/cyxb2017052

草业学报 ›› 2017, Vol. 26 ›› Issue (8): 139-145.DOI: 10.11686/cyxb2017052

子叶损伤对苦豆子幼苗早期生长的影响

刘影^{1, 2}, 赵玉^{1, 2, *}, 崔东¹, 冷家明³, 董芳慧⁴

1.伊犁师范学院生物与地理科学学院,新疆伊宁 835000;
2.新疆自治区普通高校天然产物化学与应用重点实验室,新疆伊宁 835000;
3.伊犁师范学院化学与环境科学学院,新疆伊宁 835000;
4.江苏衡谱分析检测技术有限公司,江苏南京 210007

收稿日期:2017-02-17 出版日期:2017-08-20 发布日期:2017-08-20
作者简介:刘影(1978-),女,安徽淮北人,高级实验师。E-mail:zylyzhlily@126.com
基金资助:
国家自然科学基金项目(31360101)和新疆青年科技创新人才培养工程(qn2015yx021)资助

Effect of cotyledon damage on the early growth of Sophora alopecuroides seedlings

LIU Ying^{1, 2}, ZHAO Yu^{1, 2, *}, CUI Dong¹, LENG Jia-Ming³, DONG Fang-Hui⁴

1.Biology and Geography School, Yili Normal University, Yining 835000, China;
2.University and College Key Lab of Natural Product Chemistry and Application in Xinjiang, Yining 835000, China;
3.Chemistry and Environment Science School, Yili Normal University, Yining 835000, China;
4.HOPE Analytech Inc, Nanjing 210007, China

Received:2017-02-17 Online:2017-08-20 Published:2017-08-20

摘要/Abstract

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: The aim of these experiments was to determine the effects of cotyledon damage on the growth of Sophora alopecuroides, a native invasive species in the Ili River Valley of Xinjiang. To simulate cotyledon predation, cotyledons were cut with different degrees of severity (excision of half a cotyledon, half of two cotyledons, one cotyledon, 1.5 cotyledons, and two cotyledons) or left uncut (control), and the growth of the seedlings was evaluated. The mortality rate, plant height, and leaf area strongly depended on the degree of cotyledon damage. There were no significant differences in seedlings’ taproot length among the damaged and non-damaged treatments. Compared with the control, the seedlings with 1.5 and two damaged cotyledons formed significantly fewer and shorter lateral roots, while those with half or one damaged cotyledon showed no significant difference in lateral root formation. Cotyledon damage significantly decreased the stem biomass, leaf biomass, and total biomass of seedlings, but had only small effects on the root biomass and root∶shoot ratio. As the severity of cotyledon damage increased, biomass allocation to the stem was unaffected, biomass allocation to the root significantly increased, and biomass allocation to the leaf significantly decreased. These results indicate that cotyledon damage is a bottleneck in seedling establishment and population regeneration.

刘影, 赵玉, 崔东, 冷家明, 董芳慧. 子叶损伤对苦豆子幼苗早期生长的影响[J]. 草业学报, 2017, 26(8): 139-145.

LIU Ying, ZHAO Yu, CUI Dong, LENG Jia-Ming, DONG Fang-Hui. Effect of cotyledon damage on the early growth of Sophora alopecuroides seedlings[J]. Acta Prataculturae Sinica, 2017, 26(8): 139-145.

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子叶损伤对苦豆子幼苗早期生长的影响

Effect of cotyledon damage on the early growth of Sophora alopecuroides seedlings

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