Home
Deutsch
Advanced Search
Browse by ...
Publication overview
Contact persons
Help
Publ. Version/Full Text
Postprint
DOI
PMC
 |
Open Access Green |
as soon as is submitted to ZB.
Male sterility in maize caused by transient heat stress during the tetrad stage of pollen development.
Plant Physiol. 181, 683-700 (2019)
Shifts in the duration and intensity of ambient temperature impair plant development and reproduction, particularly male gametogenesis. Stress exposure causes meiotic defects or premature spore abortion in male reproductive organs, leading to male sterility. However, little is known about the mechanisms underlying stress and male sterility. To elucidate these mechanisms, we imposed a moderate transient heat stress on maize (Zea mays) plants at the tetrad stage of pollen development. After completion of pollen development at optimal conditions, stress responses were assessed in mature pollen. Transient heat stress resulted in reduced starch content, decreased enzymatic activity, and reduced pollen germination, resulting in sterility. A transcriptomic comparison pointed toward misregulation of starch, lipid, and energy biosynthesis-related genes. Metabolomic studies showed an increase of Suc and its monosaccharide components, as well as a reduction in pyruvate. Lipidomic analysis showed increased levels of unsaturated fatty acids and decreased levels of saturated fatty acids. In contrast, the majority of genes involved in developmental processes such as those required for auxin and unfolded protein responses, signaling, and cell wall biosynthesis remained unaltered. It is noteworthy that changes in the regulation of transcriptional and metabolic pathway genes, as well as heat stress proteins, remained altered even though pollen could recover during further development at optimal conditions. In conclusion, our findings demonstrate that a short moderate heat stress during the highly susceptible tetrad stage strongly affects basic metabolic pathways and thus generates germination-defective pollen, ultimately leading to severe yield losses in maize.
Altmetric
Additional Metrics?
Edit extra informations
Login
Publication type
Article: Journal article
Document type
Scientific Article
Keywords
High-temperature Stress; Transcription Factor; Induced Repression; Gene-expression; Drought Stress; Extreme Heat; Seed Size; Wheat; Growth; Sequence
ISSN (print) / ISBN
0032-0889
e-ISSN
1532-2548
Journal
Plant Physiology
Quellenangaben
Volume: 181,
Issue: 2,
Pages: 683-700
Publisher
American Society of Plant Biologists (ASPB)
Publishing Place
15501 Monona Drive, Rockville, Md 20855 Usa
Non-patent literature
Publications
Reviewing status
Peer reviewed