Interesting techniques in barley breeding for drought and high temperature tolerance.II. Mobilization of photoassimilate

Authors

  • Águeda González
Keywords: barley, drought tolerance, mobilization of photoassimilates, grain yield

Abstract

Drought during the grain-filling period is the main factor that limits yield in cereals. The reserves accumulated in the stem are an important source of photoassimilates for grain-filling, a time when photosynthesis is commonly inhibited by heat/water stress. The mobilization of photoassimilates to the grain during this period was studied in 15 genotypes sown in the field in control and treatment blocks. The control block plants were maintained under optimum conditions for the entire growth cycle, while the treatment block plants were sprayed with a solution of potassium iodide to destroy the photosynthetic apparatus fourteen days after anthesis. The results show variability to exist between the genotypes in terms of translocation capacity, the breeding lines examined showing the greatest movement of photoassimilates (p<0.05). Earliness may have an influence on this capacity; certainly, the breeding lines reach maturity earlier than the traditional varieties examined.

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How to Cite
González, Águeda. (2008). Interesting techniques in barley breeding for drought and high temperature tolerance.II. Mobilization of photoassimilate. Agroecology, 3, 61–66. Retrieved from https://revistas.um.es/agroecologia/article/view/95581
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