Study of the effects of drought stress on seed yield and some biochemical traits of broad bean (Vicia faba L.) different genotypes

Subject Areas : Tension

Fatemeh Sheikh ¹ , Mohamad Taghi Feyzbakhsh ² , Elham Faghani ³

1 - Horticulture and Agronomy Department, Golestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran
2 - Agricultural and Natural Resource Research and Education Center Agricultural Research. Gorgan. Iran.
3 - Cotton Research Institute, Agricultural Research, Education and Extension Organization, Gorgan, Iran.

Received: 2024-07-28 Accepted : 2024-11-16 Published : 2025-06-22

Keywords: Glycine Betaine, Grain, Legume, Phenol, Proline,

Abstract :

In this experiment, 21 different genotypes of broad beans were investigated to evaluate their grain yield, yield components, and biochemical compounds under drought stress conditions. The study was conducted using a randomized complete block design with three replications across two different environments: normal irrigation and drought stress during the 2015-2016 growing season at the Gorgan Agricultural Research Station. The analysis of variance results indicated that drought stress significantly affected all traits measured, including the number of pods per plant, the number of seeds per pod, seed yield, biological yield, total endosperm phenol, proline, protein, and glycine betaine. However, the weight of one hundred seeds was not significantly impacted by drought stress. The comparison of average yields indicated that the highest seed yield was achieved by the G-faba-65 and G-faba-67 genotypes, producing 6410.3 kg/hectare under normal conditions and 3193.8 kg/hectare under drought stress. The results indicated that under drought stress, the amounts of glycine betaine (44.87%), phenol (15.67%), and proline (7.69%) were higher compared to normal irrigation conditions. According to grain yield indicators, the number of seeds in the pod, and the level of proline, genotype G-faba-67 demonstrated greater resistance to drought stress compared to other genotypes.