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The better performance of mycorrhizal plants subjected to drought stress has been commonly linked to the improvement of root water uptake through the fungal regulation of plant aquaporins and hormones. The role of ectomycorrhizal fungi in plant water relations and plant hormonal balance under mild drought was tested using split-root seedlings of Populus trichocarpa x deltoides that were either non-inoculated or inoculated with Laccaria bicolor. The root compartments where the drought treatment was applied had higher root ABA and lower cytokinin tZR contents, and greater expression of the plant aquaporins PtPIP1;1, PtPIP1;2, PtPIP2;5, and PtPIP2;7. On the other hand, the presence of L. bicolor within the roots downregulated the plant aquaporins PtPIP1;4, PtPIP2;3, and PtPIP2;10, and reduced the abundance of PIP2 proteins. Further, expression of fungal aquaporins JQ585595 and JQ585596 were positively correlated with root ABA contents, while tZR contents were negatively correlated with PtPIP1;4 and positively correlated with PtPIP2;7. The results show a coordinated plant-fungal system regulating the different mechanisms involving water uptake in ectomycorrhizal poplar plants.
This article was published in the following journal.
Name: Journal of experimental botany
Studies have suggested that increased root hydraulic conductivity in mycorrhizal roots could be the result of increased cell-to-cell water flux via aquaporins. This study aimed to elucidate if the key...
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A prolonged seizure or seizures repeated frequently enough to prevent recovery between episodes occurring over a period of 20-30 minutes. The most common subtype is generalized tonic-clonic status epilepticus, a potentially fatal condition associated with neuronal injury and respiratory and metabolic dysfunction. Nonconvulsive forms include petit mal status and complex partial status, which may manifest as behavioral disturbances. Simple partial status epilepticus consists of persistent motor, sensory, or autonomic seizures that do not impair cognition (see also EPILEPSIA PARTIALIS CONTINUA). Subclinical status epilepticus generally refers to seizures occurring in an unresponsive or comatose individual in the absence of overt signs of seizure activity. (From N Engl J Med 1998 Apr 2;338(14):970-6; Neurologia 1997 Dec;12 Suppl 6:25-30)
A class of porins that allow the passage of WATER and other small molecules across CELL MEMBRANES.
N(6)-[delta(3)-isopentenyl]adenosine. Isopentenyl derivative of adenosine which is a member of the cytokinin family of plant growth regulators.
A subgroup of aquaporins that transport WATER; GLYCEROL; and other small solutes across CELL MEMBRANES.
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