Abstract
In order to investigate the identification index of drought resistance in the forage triticale seedlings, 30 triticales withdifferent genotypes were identified by 20%–PEG6000. Results showed that responses of each gene to water stress wererelatively obvious, water content decreased, the root-shoot ratio enhanced, and leaf curvature and root hyperplasied;There was significant difference among different genotypes, material 27,29,30 showed a good representation to waterstress, and their root status were also good. The variation regularity of water content and root hyperplasia was good andthey had a great significant correlation. But the variation of root-shoot ratio is relatively complex, other factors shouldbe taken further consideration in the application.
Highlights
Drought is a worldwide problem, and only 0.007% freshwater resources in the world surface could be utilized by human beings
Triticale is a plant with quite high drought resistance, and active stress response occurring in the root system of materials was quite obvious under water stress, such as the enlargement of root system, the increment of lateral roots and so on
It could be noted that, during the seedlings of three leaves, under the same treatment, RWC was all higher than LWC, and LWL in most materials was higher than RWL after stress treatment (Table 2), which probably ascribed to the triticale's physiological structure and osmotic pressure in such growth period
Summary
Drought is a worldwide problem, and only 0.007% freshwater resources in the world surface could be utilized by human beings. Studies on the drought resistance of crops are a focus in the agriculture science at present. It possesses the properties of high production and good quality, and high resistance to environmental condition of abiotic stress, such as drought and so on. Investigation of the growth of root and shoot and the variation of water content in triticale under water stress, would be important for the screening and identifying excellent drought resistance clones of triticale, and offer references to the studies on drought resistance of other crops. Root-shoot ratio, leaf curvature and root hyperplasia of the tested materials were observed, and the growth of root and shoot and the variation of water content in triticale under water stress were undertaken comprehensive investigation
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