DWARF Overexpression Alters Phytohormone Levels, Plant Architecture, and Carotenoid Accumulation in TomatoSeptember 23, 2015
Brassinosteroids (BRs) play a critical role in plant growth and development. However, the BR-controlled regulation of plant growth has not yet been proven. Xiao-Jing Li and researchers from Zhiejang University in China explored the function of DWARF (DWF), the BR biosynthetic gene in tomato, in plant growth and architecture, phytohormone homeostasis and fruit development.
The team compared tomato wild types, with impaired DWF, and DWF-overexpressing plants. Results showed that increases in DWF transcripts and BR levels resulted in improved germination, lateral root development and plant growth. Transgenics also exhibited slender and compact plant architecture. However, overexpression of DWF resulted in the decrease in accumulation of gibberellins.
BRs positively regulated lateral bud growth as well as petiole bending and fruit ripening. Overexpression of DWF did not significantly affect fruit yield per plant, but increases can be expected in fruit yield per square meter in two transgenic lines due to their compact architecture. BR level was also found to positively regulate carotenoid accumulation in the tomato fruits.
The results show that BRs are involved in the regulation of multiple developmental processes related to agronomically important traits.
For more information, read the full article on Plant Biotechnology Journal.
The Crop Biotech Update is a weekly newsletter of ISAAA, a not-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
See more articles:
News from Around the World
- 'Tree of Life' for 2.3 Million Species Released
- USDA ARS Honors Four Experts as Science Hall of Fame
- GE Crops are Vital to Meet Food Demand, South Asia Experts Say
- Wheat without GM will Lead to Food Shortages, says World Food Prize Winner
- Australia Court Rules in Favor of GE Crop Farmers
- Scientists Clone Rare Gene to Enhance Rice Grain Yield
- Photosynthesis Gene Could Help Plants Stay Healthy in Stressful Conditions
- Identification of Powdery Mildew Susceptibility Genes in Cultivated Solanaceous Crops
- DWARF Overexpression Alters Phytohormone Levels, Plant Architecture, and Carotenoid Accumulation in Tomato
Beyond Crop Biotech
- Research Team Identifies 14 Genomes of Colombian Cocoa
- Braconid Wasps as Accidental Genetic Engineers
- Expression of a Recombinant Microbial Transglutaminase in Escherichia coli
From the BICs
- UBIC Supports the 2015 National Science Olympiad
- Biotech Trait Annual Updates 2014 and Updated Pocket Ks Now Available
- Infographic: International Science Organizations on Crop Biotech
Read the latest:
- Crop Biotech Update (September 28, 2022)
- Genome Editing Supplement (September 21, 2022)
- Gene Drive Supplement (September 28, 2022)
Subscribe to CBU: