Physiological effects of water stress on three annual clover (Trifolium spp.) species

Document Type : Research Paper

Authors

1 MSc. in Agronomy, E-mail: saeid memar@yahoo.com

2 Research Center of Agricultural and Natural resources of Fars. P.O. Box: 71555-617, Shiraz, Iran

Abstract

In order to determine the response of 3 annual clover species (6 accessions) against water stress, a greenhouse trial was conducted in a factorial an experiment based on 3 replications CRD in 2004. Root and shoot dry weight and length and root -shoot length ratio of two species and four sub species of clover were measured under (100, 75, 50 and 25) percent of field capacity (F.C). The results showed that the highest shoot and root length was obtained by 75 and 100% (F.C) treatments with 15.24 and 14.19 cm means, respectively. Also the lowest shoot and root length was related to 25% (F.C) treatment with 5.52 and 9.71 cm means, respectively. The comparison of means in shoot and root dry weight indicated that the maximum dry weight was produced by T. alexandrinum var. carmel with 0.95 and 1.1g means, respectively. While, the lowest shoot dry weight was produced by ‘Kazeroun Baladeh’, ‘Kordestan Dochin’ and ‘Abadeh Souriun’ populations. Also the lowest root dry weight was related to the species of ‘Kordestan Dochin’ population. The results showed that as Varamin species (T. alexandrinum var. carmel and T. subterraneum var clark) were more tolerant than the others. ‘Kazeroon Baladeh’ and ‘Arak Haft chin’ from T. resupinatum were the most sensitive to drought stress. Also ‘Kordestan Dochin and ‘Abadeh Sorrian’ from T. resupinatum were introduced as semi-tolerant species.

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References

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