Impacts of cold stress on some physio-biochemical characteristics of three lines/varieties of lentils

Document Type : Research Paper

Authors

1 Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran

2 Researcher, Crop Sciences Research Division, Research Center for Agriculture and Natural Resources, Ardabil, Iran

Abstract

Lentil is one of the arctic legumes which can be damaged by the severe cold. In this regard, determination of the cold tolerance among different lentil lines or varieties has considerable importance. To evaluate Bilesovar and Precoz varieties and ILL-2580 line of lentils for cold tolerance and seed yield, a field experiment was carried out as a randomized complete block design with three replications. Also, to study the physiological and biochemical responses of the lentil plants to cold conditions, a factorial experiment was conducted in the greenhouse based on a completely randomized design. The factors were cold conditions and lentil genotypes. The results showed that the highest plant height, 100-seed weight, seed yield, and the shoot dry and fresh weight were observed in the Bilesovar variety followed by Precoz. Also, the highest percentage of cold damage was observed in the ILL-2580 line. The cold damage was 80% in ILL-2580 but it was about 41 and 32% for the Bilesovar and Precoz, respectively. The results also indicated that the chlorophyll index (SPAD) declined in Billesovar and ILL-2580 under the cold stress conditions, whereas it enhanced in Precoz (252% over the control). Moreover, the proline content was significantly increased by about 300% in the cold-treated Percoz plants as compared to the control plants. The activity of the catalase, as an antioxidant enzyme, drastically increased in Precoz and Bilesavar under cold treatment (20 and 73%, respectively over the related controls). Billesovar showed a significant increase in total flavonoids and anthocyanin content of the leaves at cold conditions. The results of SDS PAGE analysis showed that in Bilesavar and Precoz, some characteristic bands with molecular weights of 30-40 and 80-90 KD appeared in the cold-treated plants that were absent in the control plants. It can be concluded that the Bilesovar of lentils might be considered a cold-tolerant variety. On the other hand, Precoz and ILL-2580 can be regarded as semi-tolerant and cold-sensitive genotypes, respectively.

Keywords

References

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Journal of Plant Physiology and Breeding
Volume 11, Issue 2
December 2021
Pages 61-72

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