การคัดเลือกแบคทีเรียทนแล้ง
With ongoing climate change, the severity, frequency and duration of drought in cotton (Gossypium
hirsutum L.), soybean (Glycine max L.), and corn (Zea mays L.) producing areas around the world are
predicted to increase. Plants’ tolerance to drought stress needs to be improved in order to allow growth of
crops that satisfy food demands under limited water resource availability. Plant-associated microbial
communities, such as mycorrhizal fungi, nitrogen-fixing bacteria, and plant growth-promoting
rhizobacteria (PGPR), enhance crop productivity and provide stress resistance. PGPR represent a wide
range of root-colonizing bacteria with excellent root colonizing ability and capacity to produce a wide
range of enzymes and metabolites that help plants tolerate both biotic and abiotic stresses. Their roles in
the management of abiotic stresses such as drought are only beginning to gain attention. In this review,
we synthesize research concerning bacterial-mediated drought tolerance in agricultural crop plants. We
summarize in a table and provide details of most relevant and recent studies about the crop system
studied, experimental system, means of applying drought stress, and physiological traits measured (such
as relative water content, photosynthesis). Furthermore, we highlight the research needed to understand
mechanisms behind observed bacterial-mediated drought tolerance and the need to homogenize and
develop screening protocols.