Abstract
Plants are increasingly exposed to high temperatures, which can cause accumulation of unfolded protein in the endoplasmic reticulum (ER). This condition, known as ER stress, evokes the unfolded protein response (UPR), a cytoprotective signaling pathway. One important branch of the UPR is regulated by splicing of bZIP60 mRNA by the IRE1 stress sensor. There is increasing evidence that commercial plant growth regulators may protect against abiotic stressors including heat stress and drought, but there is very little mechanistic information about these effects or about the regulatory pathways involved. We evaluated evidence in the B73 Zea mays inbred for differences in the activity of the UPR between permissive and elevated temperature in conjunction with plant growth regulator application. Treatment with elevated temperature and plant growth regulators increased UPR activation, as assessed by an increase in splicing of the mRNA of the IRE1 target bZIP60 following paclobutrazol treatment. We propose that plant growth regulator treatment induces bZIP60 mRNA splicing which 'primes' plants for rapid adaptive response to subsequent endoplasmic reticulum-stress inducing conditions.
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Claims 2
Claim · model-written summary
Elevated temperature and growth regulator treatment increased UPR activation measured through bZIP60 mRNA splicing after paclobutrazol.
- Material
- B73 Zea mays inbrede1
- Treatment
- elevated temperature and plant growth regulatorse0
- Gene
- bZIP60e0
- Outcome
- UPR activatione0
- Direction
- increasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with elevated temperature and plant growth regulators increased UPR activation, as assessed by an increase in splicing of the mRNA of the IRE1 target bZIP60 following paclobutrazol treatment.”
t0“maize”
e1“B73 Zea mays inbred”
Claim · model-written summary
The authors propose that growth regulator induced bZIP60 splicing primes plants for a subsequent ER stress response.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We propose that plant growth regulator treatment induces bZIP60 mRNA splicing which 'primes' plants for rapid adaptive response to subsequent endoplasmic reticulum-stress inducing conditions.”
t0“maize”
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