Effect of cold stress on chlorophyll fluorescence parameters of dryland wheat under conservation agriculture conditions

Document Type : Research Paper

Authors

1 DARI

2 University Of Tabriz

3 Department of Plant Ecophysiology, Faculty of Agriculture, University of Tabriz,, Tabriz, Iran

4 ABRI

10.22034/saps.2023.56999.3061

Abstract

Background and Objective: Investigation of chlorophyll fluorescence and performance of dryland wheat cultivars in cold climates was done to identify the effect of cold stress in conservation agriculture conditions and preservation of residues.
Materials and Methods: The experiment was carried out in the cropping years of 2017-2018 and 2018-2020 in the dryland Agriculture Research Institute on different varieties of dryland wheat. For this purpose 6 varieties of wheat were sown on three different dates rotatoin with chickpeas in two conservation tillage and conventional tillage in the form of split-split plot based on randomized complete block design was cultivated.
Results: The results showed that Sardari and Baran cultivars had the highest amount of chlorophyll. The amount of chlorophyll a and b in the no tillage treatment with 117.52 and 57.59 (mg g-1 FW) was higher than the conventional tillage treatment with the amount of chlorophyll a = 109.65 and chlorophyll b = 55.64. Chlorophyll fluorescence of Baran cultivar was better than other cultivars. the chlorophyll fluorescence of the no-tillage treatment was better than the conventional tillage treatment. The first planting date also had a better condition in terms of chlorophyll fluorescence than other planting dates.
Conclusion: Cultivars resistant to cold stress can maintain their level of photosynthesis and grain yield under conservation agriculture conditions. Adhering to the planting date of the late of september, in addition to the possibility of the plant using the autumn rains, makes the plants in a suitable development stage during the frost of the winter .

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 20 April 2025

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