脯氨酸是一种渗透分子,可调节水分胁迫下辣椒形态和生理特性的变化

A. W. Ojewumi, Samuel A. Ayoola, Abdulqudus A. Ope, Toheeb M. Iyanda
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引用次数: 1

摘要

水分胁迫是制约辣椒等蔬菜生长发育和生产效率的一个不可避免的因素。以脯氨酸为渗透剂,研究了利用脯氨酸改善水分胁迫对辣椒形态生理性状的影响。采用完全随机设计,对干旱和水分充足的幼苗分别施用20%、30%和40%不同水平的脯氨酸。结果表明,水分胁迫限制了黄杨的形态和生理特性,而不同水平的脯氨酸则增强了黄杨的形态和生理特性。喷40%脯氨酸时,植株高度最高,为26.00±0.71 cm。水分充足的幼苗叶片数(35.40±4.12 cm)和叶长(12.60±0.68 cm)最高。此外,与其他处理相比,喷40%脯氨酸处理的叶面积(89.40±2.04 cm2)、比叶面积(124.24±1.24 m2kg-1)和叶面积指数(1.76±1.13 m2m-2)显著高于其他处理(p < 0.05)。相对生长率(0.30±0.09 mg -1day-1)、净同化率(0.47±0.30 mg -2day-1)、叶面积比(0.58±0.11 mg - kg-1)和叶绿素含量(9.76±0.02µgcm2)均高于喷施40%脯氨酸的黄花苜蓿幼苗。综上所述,在水分胁迫下,20%和30%的脯氨酸维持了金盏花的形态和生理特性,但40%的脯氨酸改善效果更好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Proline as an osmolyte modulates changes in morphological and physiological attributes of Capsicum annuum l. under water stress
Abstract Water stress is an inevitable factor which limits growth, development, and production efficiency of vegetables such as Capsicum annuum (Linnaeus) (pepper). This study was carried out to investigate the use of proline as an osmolyte to ameliorate the effect of water stress on morphological and physiological attributes of Capsicum annuum. C. annuum seedlings were subjected to different levels of proline (20, 30 and 40 %) against droughted and well-watered seedlings as control in a completely randomized design. Results showed that water stress limits morphological and physiological attributes of C. annuum, while proline at different levels enhances it. Highest plant height (26.00±0.71 cm) was obtained in C. annuum sprayed with 40% proline. Well-watered seedlings of C. annuum produced the highest numbers of leaves (35.40±4.12 cm) and leaf length (12.60±0.68 cm). In addition, leaf area (89.40±2.04 cm2), specific leaf area (124.24±1.24 m2kg-1) and leaf area index (1.76±1.13 m2m-2) were significantly higher (p < 0.05) in C. annuum seedlings sprayed with 40 % proline compared with other treatments. Relative growth rate (0.30±0.09 mgg-1day-1), net assimilation rate (0.47±0.30 gm-2day-1) and leaf area ratio (0.58±0.11 m2kg-1) as well as, chlorophyll content (9.76±0.02 µgcm2), were higher in C. annuum seedlings sprayed with 40% proline. In conclusion, 20 and 30 % proline sustained morphological and physiological attributes of C. annuum under water stress, but 40% proline produced better ameliorative effects.
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