Abstract
Both drought and salinity represent the greatest plant abiotic stresses in crops. Increasing plant tolerance against these environmental conditions must be a key strategy in the development of future agriculture. The genus of Trichoderma filament fungi includes several species widely used as biocontrol agents for plant diseases but also some with the ability to increase plant tolerance against abiotic stresses. In this sense, using the species T. parareesei and T. harzianum, we have verified the differences between the two after their application in rapeseed (Brassica napus) root inoculation, with T. parareesei being a more efficient alternative to increase rapeseed productivity under drought or salinity conditions. In addition, we have determined the role that T. parareesei chorismate mutase plays in its ability to promote tolerance to salinity and drought in plants by increasing the expression of genes related to the hormonal pathways of abscisic acid (ABA) under drought stress, and ethylene (ET) under salt stress.
Highlights
IntroductionThe demand for food continues to increase year after year, agricultural productivity faces several abiotic stresses (i.e., water limitation, salinity, extreme temperatures) that reduce it, which are often associated with global warming [1]
The demand for food continues to increase year after year, agricultural productivity faces several abiotic stresses that reduce it, which are often associated with global warming [1]
Similar results were observed under salt stress conditions (Figure 1C), there are no significant differences between inoculation with T34 and with the rest of Trichoderma
Summary
The demand for food continues to increase year after year, agricultural productivity faces several abiotic stresses (i.e., water limitation, salinity, extreme temperatures) that reduce it, which are often associated with global warming [1]. Climate change is predicted to be very harmful for agriculture production, at low latitudes in developing countries. In this sense, plants have to adapt to the changing conditions in the environment they grow [3]; improving plant stress resistance is critical for agricultural productivity and for environmental sustainability [4]. The most important environmental stress that constrains crop yield is drought In this sense, more than 40% of the world is classified as dry land, an area that increases each year due to the increase in the world temperature as a result of global warming [5]. It is estimated that the damage caused by drought in crops will reduce their productivity by 36% [7], it can induce a reduction in yield between
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