В условиях вегетационного опыта изучали влияние умеренной почвенной засухи в период колошения—цветения на показатели СО2- и Н2О-газообмена и содержания хлорофилла во флаговых листьях сортов озимой пшеницы разной засухоустойчивости и их связь с зерновой продуктивностью. Ингибирование фотосинтетической активности и уменьшение содержания хлорофилла при действии засухи сопровождались снижением зерновой продуктивности растений. Выявлена тесная положительная корреляционная связь (r = 0,78…0,97) между содержанием хлорофилла, интенсивностью транспирации и фотосинтеза и зерновой продуктивностью пшеницы исследуемых сортов. Установлено, что изменения фотосинтетических показателей при умеренной почвенной засухе характеризуют устойчивость сорта и могут служить маркерами засухоустойчивости.
Ключевые слова: Triticum aestivum L., photosynthesis, transpiration, chlorophyll, productivity, physiological markers of drought tolerance
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