Plant Breeding Division, Indian Agricultural Research Institute (IARI), Regional Station, Indore, 452001 M.P. India.
School of Life Science, Devi Ahilya University, Indore, 452017 M.P. India.
Physiol Mol Biol Plants. 2014 Oct;20(4):533-7. doi: 10.1007/s12298-014-0252-4. Epub 2014 Jul 27.
In tropical countries, high temperature stress is the major abiotic stress, which controls the productivity and yield of crop plants. Two high yielding and low yielding genotypes of durum wheat were selected for detailed analysis of their photochemical efficiencies. In low yielding genotypes (Malvi local and Sawer local), the whole primary photochemical reactions are affected before and after heat stress. The results show that low yielding genotypes show less efficiency in the usage of the available excitation energy. This is a case study to establish use of chlorophyll a fluorescence measurement as an effective tool to screen plants for their stress tolerance. The study is important for stress physiology and may be useful for assessment of stress tolerant plants.
在热带国家，高温胁迫是主要的非生物胁迫因素，它控制着作物的生产力和产量。选择了两个高产和低产的硬粒小麦基因型来详细分析它们的光化学效率。在低产基因型（Malvi 本地品种和 Sawer 本地品种）中，热胁迫前后整个初级光化学反应都受到影响。结果表明，低产基因型在利用可用激发能方面效率较低。这是一项利用叶绿素荧光测量作为筛选植物抗胁迫能力的有效工具的案例研究。该研究对胁迫生理学很重要，对于评估抗胁迫植物可能也很有用。
