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  • تنش خشکی

Soybean is an annual self-fertilized crop, belonging to leguminous family and glycine genus, with 40 chromosomes. Soybean is the most important oil crop worldwide since the composition of oil and protein which plays a significant role in public health. Soybean seeds have an average of 40 percent protein and 20 percent oil. Iran import more than 90% of edible oil annually. With 50 hectares of l ...

SUBJECT: پروتئین دانه; تنش خشکی; محتوای روغن; سویا; عملکرد

Introduction Drought stress is a major factor that reduces growth, development and production of plants especially in generative phase. Among crop plants, wheat (Triticum aestivum), which often experiences water-shortage conditions, is an appealing study system because there are so many natural genotypes differing in drought tolerance. Wheat as well as the most cereals is especially threatened ...

SUBJECT: رقم حساس به تنش خشکی; کلروفیل فلورسانس; عملکرد دانه; تبادلات گازی; رقم متحمل به تنش خشکی

Introduction Hydrotime model and its coefficients are used to investigate the relationship between water potential and germination rate and percentage. The coefficients of this model puts seed quality indexes such as speed and uniformity of germination and tolerance to environmental stresses at the disposal of researchers. The reducing of water potential significantly decreased seed germinatio ...

SUBJECT: تنش خشکی; پیری; پرایمینگ; مدلسازی جوانه‏ زنی

IntroductionWater shortage is the main factor that limits growth in dry environments. Tolerant plant is able to absorb water from the soil even in conditions of limited availability so plants achieve maximum efficiency in terms of growth and productivity. Studies have shown that drought stress alone is the reason for 50 percent reduction in chickpea yield. In Iran, this problem is more serious ...

SUBJECT: تنش خشکی; خصوصیات رشدی; کودهای آلی; عناصر مغذی

Release of drought tolerant cultivars along with advance agronomic practices are effective ways to manage drought and water deficit in agriculture. In order to evaluate drought stress on 20 Iranian native and improved rice genotypes and determination of proper drought tolerance indicators in rice, an experiment was conducted based on factorial randomized complete block design with three replic ...

SUBJECT: تنش خشکی; شاخص های تحمل و حساسیت; برنج; عملکرد

Introduction Considering the importance of potato in supplying the country's required food and its dependent industries and also the climatic situation of most regions of Iran as arid and semi-arid, studying the effect of water deficit stress on potatoes is very valuable. Since one of the suitable areas for cultivating potatoes in Iran is Khorasan province, comprehensive studies on this plant ...

SUBJECT: محتوی نسبی آب برگ; تنش خشکی; عملکرد غده; شاخص سطح برگ

Introduction Drought and water shortage are the most important limiting factors in agricultural production, and environmental stresses are considered as the most serious threats for seed germination and crop growth. Researchers have mentioned crop residue management as one of the methods to improve soil physical properties, reduce evaporation intensity and protect the environment against globa ...

SUBJECT: تنش خشکی; بقایای گیاهی; رشد گیاهچه; جوانه ‏زنی

Introduction Barley (Hordeumvulgare) is one of the most important crops in the world. Water deficit at each growth stage of crop leads to a reduction in the different levels of yield. The amount of this decrease depends on many factors such as time, duration and severity of the stress period. Today’s using suitable barley cultivars under drought stress is important in increase economical yield ...

SUBJECT: تنش خشکی; عملکرد; ژنوتیپ