Established in 2020 Wednesday, October 27, 2021


Overexpression transcription factor in plant improves drought tolerance
Overexpression of ZmbHLH124T-ORG in maize enhanced plant drought tolerance. Image courtesy: IGDB.



SHIJIAZHUANG.- Maize is grown widely and the most productive staple cereal in the world, and is critical to global food security. Drought has become a severe abiotic stress that affects the global production of maize. Elucidation of the complex physiological mechanisms underlying drought tolerance will support the cultivation of new drought-tolerant maize varieties.

In collaboration with Prof. Chen Huabang from the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences, researchers led by Prof. Xie Qi from IGDB isolated one gene involved in drought response in maize by using comparative transcriptome and bin map subtraction.

They selected two drought-tolerant lines, RIL70 and RIL73, and two drought-sensitive lines, RIL44 and RIL93, from a drought-related recombinant line population for RNA-seq analysis. They found that gene expression differences not only existed between drought-tolerant and -sensitive lines, but also between the drought-tolerant lines through joint analysis.

A basic helix-loop-helix (bHLH) type transcription factor encoded by ZmbHLH124T-ORG originated from RIL73, was specifically up-regulated during drought stress. Overexpression of ZmbHLH124T-ORG in maize and rice enhanced plant drought tolerance and up-regulated the expression of drought-responsive genes. Moreover, ZmbHLH124T-ORG could directly bind the cis-acting elements in ZmDREB2A promoter to activate its expression.

This work identifies a valuable genetic locus and provides a new strategy for breeding drought-tolerant crops.

This study entitled "ZmbHLH124 identified in maize recombinant inbred lines contributes to drought tolerance in crops" was published online in Plant Biotechnology Journal on May 25.

This work was supported by the National Key R&D Program of China, and the Transgenic Research Projects.







Today's News

June 10, 2021

The strange afterglow of a gamma-ray burst

Canadian telescope detects 500 fast radio bursts in a year, quadrupling number of known FRBs

Trained viruses prove more effective at fighting antibiotic resistance

First glimpse of brains retrieving mistaken memories observed

Researchers link ancient wooden structure to water ritual

Earth's meteorite impacts over past 500 million years tracked

Nottingham expert wins award for work replacing the use of animals in research

Cholesterol metabolite induces production of cancer-promoting vesicles

Stabilizing gassy electrolytes could make ultra-low temperature batteries safer

Predisposition to addiction may be genetic

Cardiac MRI effective in detecting inflammation of the heart in athletes who had COVID-19

Super productive 3D bioprinter could help speed up drug development

The digestive system of cows influences human's vitamin B12 intake

A vital tool to study virus evolution in the test tube

Common diabetes drug shows promise as treatment for COVID-19 lung inflammation

For a low-carbon cement recipe, Stanford scientists look to Earth's cauldrons

Tiny particles power chemical reactions

Overexpression transcription factor in plant improves drought tolerance



 


Editor & Publisher: Jose Villarreal
Art Director: Juan José Sepúlveda Ramírez



Tell a Friend
Dear User, please complete the form below in order to recommend the ResearchNews newsletter to someone you know.
Please complete all fields marked *.
Sending Mail
Sending Successful