Method for identifying early-stage chilling tolerance of cucumis sativus L

Abstract

The invention discloses a method for identifying the early-stage chilling tolerance of cucumis sativus L. The method is characterized in that the chilling tolerance of the cucumis sativus L is identified by means of measuring chlorophyll contents and chlorophyll fluorescent parameters Fo of leaves of seedlings of the cucumis sativus L. The method has the advantages that a growth index, physiological and biochemical indexes and the chlorophyll fluorescent parameter Fo of each material are measured under a low-temperature stress condition, correlation coefficients among the various indexes and chilling injury indexes of the materials are computed, the correlation coefficients among the chlorophyll contents and the chilling injury indexes and the correlation coefficients among the chlorophyll fluorescent parameters Fo and the chilling injury indexes are the highest, and accordingly the chlorophyll contents and the chlorophyll fluorescent parameters Fo can be directly measured by a chlorophyll content tester and a chlorophyll luminoscope, plants are prevented from being injured, the method is simple, operation is easy, and a basis can be provided for chilling-tolerance variety screening and breeding for production.

Description

1. Technical field: [0001] The invention relates to an identification method for screening cold tolerance of cucumbers, in particular to an identification method for screening cold tolerance cucumbers by measuring chlorophyll content and chlorophyll fluorescence parameter Fo value. 2. Background technology: [0002] Cucumber (Cucumis sativus L.) is the main vegetable crop in winter-spring protected area production, but because cucumber is a typical cold-sensitive crop, the plant encounters low temperature damage of 0-15 °C in winter and spring and becomes an annual production of cucumber. main limiting factor. Therefore, how to improve the cold tolerance of cucumber has become an urgent problem in protected cultivation and variety breeding. In order to effectively identify the adaptability of cucumber varieties to low temperature, many researchers at home and abroad have discussed the effects of low temperature on the germination of cucumber seeds, the growth and photosynth...

AI Technical Summary

Problems solved by technology

In order to effectively identify the adaptability of cucumber varieties to low temperature, many researchers at home and abroad have discussed the effects of low temperature on the germination of cucumber seeds, the growth and photosynthesis of seedlings, and a series of physiological and biochemical defense mechanisms. There are relatively few literature reports on which indicators can effectively identify the cold tolerance of cucumber

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