Effects of exogenously applied plant growth regulators in combination with PGPR on the physiology and root growth of chickpea (Cicer arietinum) and their role in drought tolerance

By N. Khan, A. Bano, P. Zandi. 2018

170 citations recorded by the source corpus.

ABSTRACT Both the plant growth promoting rhizobacteria (PGPR) and plant growth regulators (PGR) exert beneficial effects on plant growth even under stress, but combined effect of both of them has not been evaluated yet. Present investigation was aimed to determine the responses of 2 chickpea varieties (differing in drought tolerance) to 3 PGPR viz. Bacillus subtilis, Bacillus thuringiensis and Bacillus megaterium and PGR (SA and Putrescine) on physiology of chickpea grown in sandy soil. The PGR, Salicylic acid (SA) and Putrescine (Put) were sprayed on the seedling 20 days after germination. Results revealed, synergistic effects of PGPR and PGR on chlorophyll, protein and sugar contents. Addition of PGR to PGPR inoculated plants assisted the plant in osmoregulation and amelioration of oxidative stresses and in induction of new proteins. Combined application of PGR and PGPR decreased lipid peroxidation more effectively but increased the leaf area. It is inferred that PGPR and PGR work synergistically to promote growth of plants under moisture and nutrient deficit condition of sandy soil. Since, SA induces Systemic Acquired Resistance (SAR) in plants hence the addition of SA along with PGPR may render the plant more productive and better tolerant to diseases/pathogen attack.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/7b1cd801d57d136f6e5296a0667bcf71e33eb934

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In Plant Science

1. Shahid Ali
2. N. Khan
3. A. Iqbal
4. Linan Xie
5. Kashif Hayat

Citations in the corpus

• Chlorophyll Fluorescence Parameters and Antioxidant Defense System Can Display Salt Tolerance of Salt Acclimated Sweet Pepper Plants Treated with Chitosan and Plant Growth Promoting Rhizobacteria (2020, background): “Nonetheless, the enzymatic defense system contains ascorbate peroxidases (APX), glutathione reductases (GR), superoxide dismutases (SOD), catalases (CAT), and peroxidases (POD), which protect the plant tissues against stress factors [25].”
• Role of sugars, amino acids and organic acids in improving plant abiotic stress tolerance (2020, background): “Substantial data are available for dissecting plant responses to environmental stresses, but the connections between diverse stresses have been far less inspected (Khan et al., 2018a; Suzuki et al., 2014).”
• Implications of Abscisic Acid in the Drought Stress Tolerance of Plants (2020, background): “CPKs are monomeric, highly conserved proteins that are involved in plant growth and development, defense, stress signaling, and proteasome regulation [61,62].”