Investigation of some morphological characteristics of two native barley cultivars in Sistan region under Drought stress

Drought is an important environmental limiting factor for products around the world. Barley is one of the plants that is cultivated due to adaptation of its genotypes to different environmental conditions and different aspects of its consumption in vast regions of the world with different climatic conditions. In present investigation, to study the effects of drought stress on growth and morphological parameters on two cultivars native to Sistan region (Nimroz and Nomar). , This experiment was performed as a factorial in a completely randomized design with three replications in ۲۰۲۰ at the Faculty of Agriculture, University of Zabol. The experimental treatment was included drought stress (irrigated in Field capacity, depletion of soil water content up to ۵۰% and ۷۵% of FC condition). The studied traits were included the root length, stem length, fresh and dry weight of shoot, fresh and dry weight of root. The results showed that drought stress had a significant effect at the level of one percent on all morphological studies,so that with applying drought stress, the root length increased, and stem length, fresh and dry weight of aerial parts, fresh and dry weight of root decreased. The results of comparison of mean data showed that the soil’s water content lose to the ۷۵% of the field capacity led had the greatest effect among the studied drought stress levels and caused the greatest increased in root length and also the greatest decreased in stem length, fresh and dry weight of shoots, fresh and dry weight of roots. Based on the results between the two studied cultivars, Nimroz cultivar was superior to Nomar cultivar in drought stress conditions.

کلیدواژه ها:

Nimroz and Nomar barley cultivars ، Root characteristics ، drought stress levels