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Abstract The effects of waterlogging stress on the growth, chlorophyll and MDA content of cucumber seedlings were studied by using cucumber varieties (Cucumis sativus L. cv. Jinyan No.7) as materials. The results show that plant height, leaf number, shoot fresh weight, total root length, total projected area and total surface area of cucumber seedlings showed insignificant differences with those of the control; root fresh weight, root average diameter, total root volume were significantly higher, but the number of root tips and furcation number increased first and then reduced; the chlorophyll content of cucumber seedlings was significantly lower than that of control; MDA content was significantly higher than that of control under waterlogging stress. It was showed that the cucumber was tolerant to waterlogging stress, but the ability of waterlogging stress was limited, and the physiological was significantly hurt and photosynthesis of cucumber seedlings was significantly affected by waterlogging stress.
Key words Cucumber; Waterlogging stress; Growth; Physiological index
About 10% global farmland is affected by waterlogging stress that has become a really critical factor influencing agricultural yield111. It stops air and oxygen from getting in soils, impacting crop uptake in terms of water and nutrient. Consequently, crop growth and development will be affected [2]. Because of eco-environment exacerbation, devastating floods become frequent, resulting in huge economic loss131. Cucumber (Cucumis sativus) is a cultivated plant in the Cucumis in the family of Cucurbitaceae. With rich nutrients and high medical value, cucumber holds an important position in vegetable industrial economy. Its roots grow well in moist environment but tend to be poor if oxygen is insufficient14-51. Therefore, it is of practical significance for achieving high and stable yields of cucumbers to explore the effects of waterlogging stress on cucumber. However, relevant researches available are rare[6]. Therefore, the research performed comparisons the effects on cucumber seedling growth, and contents of chlorophyll and MDA by waterlogging, in order to provide references for highyielding cultivation of cucumber.
Materials and Methods
Test design
The test was carried out in a plastic greenhouse of Yangtze University and laboratory of Horticultural Plant Biology. The cucumber variety is Jinyan No. 7 (C. sativus cv. Jinyan No. 7) and the seeds were purchased from Jinghua Seeds from Jinzhou City. The plants were grown in...