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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： Aslam, Anisa 1 ; Khan, Shahbaz 2 ; Ibrar, Danish 2 ; Irshad, Sohail 3 ; Bakhsh, Ali 4 ; Gardezi, Syed Tahir Raza 5 ; A 1 ;

作者机构： 1.Univ Agr Faisalabad, Dept Bot, Faisalabad 38040, Pakistan

2.Natl Agr Res Ctr, Islamabad 45500, Pakistan

3.MNS Univ Agr, Dept Agron, Multan 64200, Pakistan

4.Ghazi Univ, Dept Plant Breeding & Genet, Dera Ghazi Khan 32200, Pakistan

5.Bahauddin Zakariya Univ, Dept Agron, Multan 60800, Pakistan

6.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad 38040, Pakistan

7.PMA Shah Arid Agr Univ, Dept Agron, Rawalpindi 46000, Pakistan

8.King Saud Univ, Coll Sci, Dept Bot & Microbiol, POB 2455, Riyadh 1211451, Saudi Arabia

9.Chinese Acad Agr Sci, Beijing 100081, Peoples R China

10.Slovak Univ Agr, Inst Plant & Environm Sci, Nitra 94976, Slovakia

11.Czech Univ Life Sci, Fac Agrobiol Food & Nat Resources, Dept Bot & Plant Physiol, Prague 16500, Czech Republic

12.Univ Putra Malaysia, Fac Agr, Dept Land Management, Seri Kembangan 43400, Selangor, Malaysia

关键词： achene; catalase; growth; hybrid; phenolic; stress

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN：

年卷期： 2021 年 11 卷 10 期

页码：

收录情况： SCI

摘要： Salt stress is recognized to negatively influence the fundamental processes in plants regarding 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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