Do plant-growth promoting bacteria contribute to greater persistence of tropical pastures in water deficit? - A review

Abstract

The use of plant-growth promoting bacteria (PGPB) in pastures is a sustainable alternative to increment forage production. Besides, it is an innovative technology that can mitigate the effects of water deficit (WD) in pastures. Currently, WD is one of the main abiotic stressor agents responsible for a negative impact on agricultural production. Permanent or temporary WD imposes limitations on the growth and development of forage plants more than any other environmental factors. Although there have been studies for many years to improve resistance to WD and efficiency in water usage, the mechanism involved in the process is still not clear. A better understanding of the relations between plant and water and the mechanisms of tolerance to WD can significantly improve pastures productivity and environmental quality. Despite the mechanisms that allow plants to adjust as a response to WD, depending on its severity and duration plants are not capable to survive the stress by themselves. For that reason, the use of technologies such as PGPB can make them more resistant to WD without jeopardizing their development and productivity. There are studies that show the positive effects of PGPB in grasses during WD. In this review, we are going to present an overview of the causes, effects and responses of the inoculation of PGPB in grasses exposed to water deficit.

Improved salinity and dust stress tolerance in the desert halophyte Haloxylon aphyllum by halotolerant plant growth-promoting rhizobacteria

“…In addition, these bacteria modulate and regulate the physiological and biochemical responses of plants and increase plant tolerance to salinity stress and, consequently, plant survival under stressful conditions (Del Carmen Orozco-Mosqueda et al, 2020;Amini Hajiabadi et al, 2021). The effective role of PGPB in increasing the growth and yield of plants, especially forage plants, has been shown by several researchers (Santos et al, 2019;Mamédio et al, 2020). For example, Mohmmad Abadi et al (2021) used PGPB to improve the vegetative traits of H. aphyllum seeds.…”