Phosphorus tolerance levels of different chickpea genotypes

Area of Science:

• Agricultural Science
• Plant Physiology
• Soil Science

Background:

• Phosphorus (P) is a vital macronutrient for plant growth.
• Understanding phosphorus tolerance is crucial for optimizing crop yields in varying soil conditions.

Purpose of the Study:

• To assess the phosphorus tolerance levels of nine distinct chickpea genotypes.
• To identify chickpea genotypes with superior growth and phosphorus accumulation under different P concentrations.

Main Methods:

• Greenhouse screening of nine chickpea genotypes across seven phosphorus (P) doses (15-120 mg P kg⁻¹ soil).
• Evaluation of P-deficiency symptoms, root and shoot biomass, and P accumulation 55 days post-sowing.
• Principal Component Analysis (PCA) for genotype grouping based on growth and P acquisition traits.

Main Results:

• Significant variations in growth and nutrient acquisition traits were observed among genotypes and P levels.
• Optimal shoot biomass was achieved at 90-120 mg P kg⁻¹ soil, while root biomass peaked at 45-90 mg P kg⁻¹.
• Genotypes 'Gökçe' and 'Çağatay' exhibited highest shoot biomass, while 'Diyar. 95' showed lowest shoot and highest root biomass and P accumulation.

Conclusions:

• Chickpea genotypes display varied responses to phosphorus availability and toxicity.
• Specific genotypes like 'Gökçe', 'Çağatay', 'İzmir', and 'ILC.482' show potential for breeding programs aimed at phosphorus-efficient crops.
• PCA effectively grouped genotypes, highlighting distinct P tolerance and accumulation profiles.