Статья

Exogenously Applied Gibberellic Acid Enhances Growth and Salinity Stress Tolerance of Maize through Modulating the Morpho-Physiological, Biochemical and Molecular Attributes

Kashif ShahzadDepartment of Botany, University of Agriculture Faisalabad, Faisalabad 38040, PakistanSadam HussainCollege of Agronomy, Northwest A&F University, Yangling 712100, ChinaMuhammad ArfanDepartment of Botany, University of Agriculture Faisalabad, Faisalabad 38040, PakistanSaddam HussainCollege of Agronomy, Northwest A&F University, Yangling 712100, ChinaEjaz Ahmad WaraichDepartment of Agronomy, University of Agriculture Faisalabad, Faisalabad 38040, PakistanShahid Ibni ZamirDepartment of Agronomy, University of Agriculture Faisalabad, Faisalabad 38040, PakistanMaham SaddiqueDepartment of Botany, University of Agriculture Faisalabad, Faisalabad 38040, PakistanAbdur RaufDepartment of Chemistry, University of Swabi, Anbar 23430, PakistanKhaled Y. KamalAgronomy Department, Faculty of Agriculture, Zagazig University, Zagazig 44519, EgyptChristophe HanoLaboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRAE USC1328, Université d’Orléans, 28000 Chartres, FranceMohamed A. El‐EsawiBotany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt

2021en

ABI

Аннотация

Soil salinity is the major limiting factor restricting plant growth and development. Little is known about the comparative and combined effects of gibberellic acid (GA3) seed priming and foliar application on maize under salt stress. The current study determined the impact of different application methods of GA3 on morpho-physiological, biochemical and molecular responses of maize seedlings under three salinity stress treatments (no salinity, moderate salinity-6 dS m−1, and severe salinity-12 dS m−1). The GA3 treatments consisted of control, hydro-priming (HP), water foliar spray (WFS), HP + WFS, seed priming with GA3 (GA3P, 100 mg L−1), foliar spray with GA3 (GA3FS, 100ppm) and GA3P + GA3FS. Salt stress particularly at 12 dS m−1 reduced the length of shoots and roots, fresh and dry weights, chlorophyll, and carotenoid contents, K+ ion accumulation and activities of antioxidant enzymes, while enhanced the oxidative damage and accumulation of the Na+ ion in maize plants. Nevertheless, the application of GA3 improved maize growth, reduced oxidative stress, and increased the antioxidant enzymes activities, antioxidant genes expression, and K+ ion concentration under salt stress. Compared with control, the GA3P + GA3FS recorded the highest increase in roots and shoots length (19–37%), roots fresh and dry weights (31–43%), shoots fresh and dry weights (31–47%), chlorophyll content (21–70%), antioxidant enzymes activities (73.03–150.74%), total soluble protein (13.05%), K+ concentration (13–23%) and antioxidants genes expression levels under different salinity levels. This treatment also reduced the H2O2 content, and Na+ ion concentration. These results indicated that GA3P + GA3FS could be used as an effective tool for improving the maize growth and development, and reducing the oxidative stress in salt-contaminated soils.

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Идентификаторы

DOI: 10.3390/biom11071005

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar