Related Experiment Video
Updated: Jun 29, 2026
14:43
Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
Published on: July 23, 2014
13.4K
ZmMPK6, a mitogen-activated protein kinase, regulates maize kernel weight
Wenyu Li1, Yayong Li1, Huiyue Shi1
1State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, Henan 450046, China.
Journal of Experimental Botany
|March 8, 2024
Summary
Maize mitogen-activated protein kinase 6 (ZmMPK6) regulates kernel weight. Modifying ZmMPK6 expression impacts starch, protein, and grain filling, offering potential for maize breeding.
Area of Science:
- Plant Biology
- Genetics
- Agronomy
Background:
- Kernel weight is a crucial trait for maize yield and quality.
- While numerous genes influence kernel weight, few have been utilized in breeding programs.
- Understanding the genetic regulation of kernel weight is vital for improving maize production.
Purpose of the Study:
- To identify and characterize novel genes involved in maize kernel weight regulation.
- To investigate the specific role of maize mitogen-activated protein kinase 6 (ZmMPK6) in determining kernel weight.
Main Methods:
- Analysis of kernel weight in ZmMPK6 knockout mutants and overexpression lines.
- Assessment of starch granules, starch content, protein content, and grain-filling characteristics.
- Subcellular localization and expression pattern analysis of ZmMPK6 during kernel development.
Main Results:
- ZmMPK6 plays a significant role in regulating maize kernel weight, with reduced weight in mutants and increased weight in overexpression lines.
- ZmMPK6 expression levels influenced starch granules, starch and protein content, and grain-filling dynamics.
- ZmMPK6 was found to be localized in the nucleus and cytoplasm and expressed throughout kernel development.
Conclusions:
- ZmMPK6 is a novel regulator of maize kernel weight, impacting key grain quality components.
- The findings provide valuable insights for molecular breeding strategies aimed at enhancing maize kernel quality and yield.
Related Concept Videos
02:41Chromatin Structure Regulates pre-mRNA Processing
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
02:23Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...