数字农科院2.0

Defensive impact of foliar applied potassium nitrate on growth linked with improved physiological and antioxidative activities in sunflower (Helianthus annuus l.) hybrids grown under salinity stress

文献类型： 外文期刊

作者： Anisa Aslam;Shahbaz Khan;Danish Ibrar;Sohail Irshad;Ali Bakhsh;Syed Tahir Raza Gardezi;Madad Ali;Zuhair Hasnain;Abdulrahman Al-Hashimi;Mehmood Ali Noor;Marian Brestic;Milan Skalicky;Ali Tan Kee Zuan

作者机构：

关键词： Achene;Catalase;Growth;Hybrid;Phenolic;Stress

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2021 年 11.0 卷 10.0 期

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收录情况： JCR（2021版）

摘要： Salt stress is recognized to negatively influence the fundamental processes in plants regard-ing growth and yield. The sunflower (Helianthus annuus L.) is considered an important industrial crop because of the good quality of oil it produces that can be used for cooking purposes. The exogenous application of potassium (K) has been reported to enhance abiotic resistance and increase yield in crops. Here, we explored the impact of foliar-applied K at 500 ppm on the physiological and biochemical traits, antioxidant activities, and growth attributes of sunflower grown under salt stress (140 mM NaCl). The findings indicated that salinity stress adversely affected photosynthesis and various gas exchange characteristics. Foliar applied K markedly improved the stomatal conductance, transpiration rate, water use efficiency, CO2 assimilation rate, total soluble proteins, chlorophyll pigments, and upregulated antioxidant system, which are responsible for the healthy growth of sunflower hybrids grown under salinity stress. The shoot and root lengths, plant fresh and dry weights, and achene weight were significantly increased by K application. Overall, foliar applied K significantly improved all of the aforementioned attributes and can attenuate the deleterious influences of salinity stress in sunflower.

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