Both uniconazole and 5-aminolevulinic acid increase maize (Zea mays L.) yield by changing its ear morphology and increasing photosynthetic efficiency and antioxidants in saline-alkali land.
L Xu, N J Feng, X L Liang, H H Zhao, S Y Wang, Y Jiang, Y Zhao, D F Zheng
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引用次数: 0
Abstract
Saline-alkaline stress is one of the most detrimental abiotic stresses that restrict the yield and physiological activity of maize (Zea mays L.). In the present study, maize was planted on saline-alkali land, while 25 mg L-1 uniconazole (S3307) and 40 mg L-1 5-aminolevulinic acid (ALA) were sprayed at the stage of nine expanded leaves. Our results showed that both S3307 and ALA applications significantly increased all ear width, volume, and mass in the maturity stage. Both applications also upregulated photosynthetic efficiency via increasing the chlorophyll content, net photosynthetic rate, transpiration rate, and stomatal conductance, as well as reduced the intercellular CO2 concentration after the silking stage. In addition, both applications upregulated further the antioxidant system via enhancing the activity of antioxidants and contents of soluble protein and sugar, as well as reducing the malondialdehyde content after the silking stage. Thus, both S3307 and ALA applications can improve maize yield in saline-alkali land via enhancing ear morphology and increasing photosynthetic efficiency and antioxidants.
盐碱胁迫是限制玉米产量和生理活性的最有害的非生物胁迫之一。本试验在盐碱地上种植玉米,在九张叶期喷施25 mg L -1单唑(S3307)和40 mg L -1 5-氨基乙酰丙酸(ALA)。结果表明,在成熟期,施用S3307和ALA均显著增加了所有穗宽、体积和质量。两种施用均通过增加叶绿素含量、净光合速率、蒸腾速率和气孔导度来上调光合效率,并降低吐丝期后细胞间co2浓度。此外,两种处理都通过提高抗氧化剂活性、可溶性蛋白质和糖的含量,以及降低吐丝期后丙二醛的含量,进一步上调了抗氧化系统。因此,施用S3307和ALA均可通过改善玉米穗形、提高光合效率和抗氧化能力来提高盐碱地玉米产量。
期刊介绍:
Photosynthetica publishes original scientific papers and brief communications, reviews on specialized topics, book reviews and announcements and reports covering wide range of photosynthesis research or research including photosynthetic parameters of both experimental and theoretical nature and dealing with physiology, biophysics, biochemistry, molecular biology on one side and leaf optics, stress physiology and ecology of photosynthesis on the other side.
The language of journal is English (British or American). Papers should not be published or under consideration for publication elsewhere.