Photosynthetic functions in plants subjected to stresses are positively influenced by priming

Abstract

Photosynthesis is a process that has got immense importance due to its unique role in sustaining life on earth. Exposure to various biotic and abiotic stresses adversely affects the photosynthesis in plants and reduces crop yield. In this scenario, the necessity for mitigating the impacts of stressors on the photosynthetic machinery of plants needs urgent attention. Priming techniques can alleviate the stress effects and help the plants to have a better crop stand. The increased amount of photosynthetic pigments such as chlorophyll a, chlorophyll b, carotenoids and anthocyanins, better photosystem stability, improved Chl a fluorescence parameters, enhanced carboxylation efficiency of Rubisco are the major benefits attained with priming treatments. The overall enhancement in photosynthetic attributes of primed plants ultimately increases plant growth, plant biomass, yield and productivity. Priming associated molecular changes on the photosynthetic performance of plants need to be understood for developing photosynthetically efficient plants under stress conditions so that productivity is not compromised.

Keywords

• Carbon assimilation
• Chl a fluorescence
• Photosystems
• Pigments
• Priming
• Stress