084f2db8c6 Both gene discovery and physiological breeding are being facilitated by (1) understanding how adaptive traits enhance yield in heat-stressed environments as well as (2) the development and application of phenotyping platforms to (3) screen experimental populations in order to pinpoint alleles of interest and (4) identify promising new genetic resources. Photosynthetic response and adaptation to temperature in higher plants. Gourdji, K.L. Field Crops Res 135: 3037 CrossRefWeb of ScienceGoogle Scholar Djanaguiraman M, Prasad PVV (2010) Ethylene production under high temperature stress causes premature leaf senescence in soybean. Genetic diversity for pollen viability under HS has been identified in cotton (Gossypium hirsutum; Burke, 2007), and reduced pollen viability under HS has been linked to carbohydrate metabolism in other cereals like sorghum (Sorghum bicolor; Jain et al., 2007; Prasad and Djanaguiraman, 2011). At very high temperatures cause severe cellular injury and cell death may occur within short time, thus leading to a catastrophic collapse of cellular organization (Schoffl et al., 1999).[4] However, under moderately high temperatures, the injury can only occur after longer exposure to such a temperature however the plant efficiency can be severely affected.
Physiological Traits for Improving Heat Tolerance in Wheat . Partitioning of Total Assimilate Traits The adaptation of reproductive growth to HS is obviously crucial to determining grain sink strength, while the ability to synthesize, store, and remobilize starch at high temperature will determine final kernel weight. Science 323: 13601363 Abstract/FREE Full Text Kumar A, Li C, Portis AR Jr. The physiological breeding approach aims to combine traits associated with all three drivers of yield to result in a cumulative genetic effect on yield. Rev. Decliend photosynthesis is suggested as measure of heat stress sensitivity in plants.[13]. Natural diversity in the optimum temperature of Rubisco activase exists and may be exploited. Crop Responses to Environment. In many species it has been demonstrated that HSPs results in improved physiological phenomena such as photosynthesis, assimilate partitioning, water and nutrient use efficiency, and membrane stability.
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