首页分享利用水分胁迫处理鉴定耐旱凤仙花基因型

利用水分胁迫处理鉴定耐旱凤仙花基因型

来源：花匠小妙招时间：2024-12-19 22:06

摘要

耐旱凤仙花基因型以其对有限或压力水的抗性而闻名。本研究旨在鉴定凤仙花无性系的耐旱性。试验采用分样设计，重复3次，以水分胁迫处理为主样，凤仙花无性系为次样。主要地块由田间容量的100%和60%组成。子图包括5个凤仙花无性系，17.12;12;33.3;以黑斑羚(Impala Agrihorti)的Impatiens cv为对照。结果表明，60%的田间容量降低了植株的形态和生理性状。尽管如此，耐旱无性系受压力的影响较小，而且比其他无性系开出的花更多。最耐旱的凤仙花是克隆12。凤仙花的抗旱机制是在生长介质湿度降低时气孔关闭。在抗旱植物中，气孔关闭对鲜重和干重的影响不显著，但影响了开花的延迟。植物积累的同化物质用于株高和株径的生长，但不足以用于生殖起始。它们在营养阶段被同化，可以作为花形成的来源，花的数量没有显著减少。研究表明，具有抗旱优势的凤仙花无性系可作为抗旱基因型来源，也可作为景观植物凤仙花新品种投放市场。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Identifying Drought-Tolerant Impatiens Genotypes by Using Water Stress Treatment

The drought-tolerant Impatiens genotypes are known for their resistance to limited or stressed water. The study aimed to identify drought-tolerance of Impatiens clones. The experiment used a split-plot design replicated three times, with the water stress treatment as the main plot and Impatiens clones as subplots. The main plot consists of 100% and 60% of field capacity. The subplots consist of five Impatiens clones, 17.12; 12; 33.3; 40 B and Impatiens cv of Impala Agrihorti as a control. The results showed that 60% field capacity decreased morphological and physiological traits. Still, the drought-tolerant clones were less affected by the stress and produced more flowers than the others. The most drought-tolerant Impatiens was clone 12. The mechanism of drought tolerance Impatiens was by stomatal closure when the humidity in the growing medium was decreasing. The stomata closure did not significantly reduce the fresh and dry weight in drought-tolerant plants, but it affected the delay in flower initiation. The plant accumulated assimilate for plant height and diameter growth but is not sufficient for generative initiation. They assimilate in the vegetative phase and can be used as sources for flower formation, which show no significant decrease in the number of flowers. The study implies that the drought-tolerant Impatiens clones can be used as genotype sources for drought-tolerant or can be released as new varieties of Impatiens for landscape plants with the superiority in having drought tolerant.