The Effect of Drought Stress on Morpho-Physiological Responses of Wild Mustard (Sinapis arvensis L.) and Chickpea (Cicer arietinum L.) under Interference Conditions | ||
| دانش علفهای هرز ایران | ||
| Articles in Press, Accepted Manuscript, Available Online from 23 February 2026 | ||
| Document Type: Research Article | ||
| DOI: 10.22034/ijws.2026.371507.1515 | ||
| Authors | ||
| Ebrahim Izadi-Darbandi* 1; Rahim Bkhsh Mohammadnezhad2; Mehdi Rastgoo3 | ||
| 1Department of Agrotechnology- Faculty of Agriculture -Ferdowsi University of Mashhad | ||
| 2Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad | ||
| 3گروه زراعت- دانشکده کشاورزی- دانشگاه فردوسی مشهد | ||
| Abstract | ||
| To evaluate the effects of different drought stress levels on the morpho-physiological responses of wild mustard and chickpea under interference conditions, a factorial experiment was conducted in a completely randomized design with three replications in the research greenhouse of the Faculty of Agriculture, Ferdowsi University of Mashhad. The experimental treatments comprised five interference ratios of chickpea/wild musturd (100/0, 75%/25%, 50%/50%, 25%/75% and 0/100%) and three drought stress levels (50%, 75%, and 90% field capacity). Results indicated that increasing drought stress intensity (from 90% to 50% field capacity) reduced chickpea bilogical and grain yields by up to 45% and 60%, respectively. Moreover, higher proportions of wild mustard interference significantly decreased chickpea grain yield; grain yield declined by 20%, 40%, and 65% as chickpea proportion decreased from 100% to 25%. Physiological parameters of chickpea, including stomatal conductance and net photosynthesis rate, were also markedly influenced by both drought stress and competitive ratios. At 50% field capacity, stomatal conductance and photosynthetic rate decreased by 35% and 45%, respectively, whereas at 75% field capacity, reductions reached 50% and 60%. Increasing wild mustard interference exerted a pronounced negative effect: in the 25%/75% mixture, stomatal conductance and net photosynthesis were 30% lower than in the sole chickpea treatment. The interaction between drought stress and interference ratio revealed that under the severe drought stress (50% field capacity) combined with the highest wild mustard interference (75%/25%), chickpea yield declined by more than 75%. Notably, severe drought stress appeared to attenuate the competitive ability of wild mustard,, | ||
| Keywords | ||
| Competitive ability; Field capacity; Grain yield; Photosynthetic rate; Stomatal conductance | ||
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