Journal
PLANT JOURNAL
Volume 75, Issue 5, Pages 823-835Publisher
WILEY-BLACKWELL
DOI: 10.1111/tpj.12245
Keywords
Gossypium hirsutum; casein kinase I; high temperature; anther abortion; programmed cell death; starch synthase; Arabidopsis
Categories
Funding
- National High Technology Research and Development Program of China [2011AA10A102, 2013AA100601-4]
Ask authors/readers for more resources
Anther infertility under high temperature (HT) conditions is a critical factor contributing to yield loss in cotton (Gossypium hirsutum). Using large-scale expression profile sequencing, we studied the effect of HT on cotton anther development. Our analysis revealed that altered carbohydrate metabolism or disrupted tapetal programmed cell death (PCD) underlie anther sterility. Expression of the Gossypium hirsutum casein kinaseI (GhCKI) gene, which encodes a homolog of casein kinaseI (CKI), was induced in an HT-sensitive cotton line after exposure to HT. As mammalian homologs of GhCKI are involved in inactivation of glycogen synthase and the regulation of apoptosis, GhCKI may be considered a target gene for improving anther fertility under HT conditions. Our studies suggest that GhCKI exhibits starch synthase kinase activity, increases glucose content in early-stage buds and activates the accumulation of abscisic acid, thereby disturbing the balance of reactive oxygen species and eventually disrupting tapetal PCD, leading to anther abortion or indehiscence. These results indicate that GhCKI may be a key regulator of tapetal PCD and anther dehiscence, with the potential to facilitate regulation of HT tolerance in crops.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available