Related Experiment Video
Updated: Jul 7, 2026

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer
Published on: October 14, 2022
NARROW LEAF 7 controls leaf shape mediated by auxin in rice
Kenji Fujino1, Yasuyuki Matsuda, Kenjirou Ozawa
1Agricultural Research Institute, HOKUREN Federation of Agricultural Cooperatives, Higashi-5, Kita-15, Naganuma, Hokkaido 0691317, Japan. fujino-kenji@hokuren.jp
Researchers identified a rice gene, narrow leaf 7 (nal7), crucial for leaf width. This gene is involved in auxin biosynthesis, impacting plant development and potentially crop traits.
Area of Science:
- Plant Genetics
- Molecular Biology
- Crop Science
Background:
- Leaf shape is a key crop trait influencing yield and stability.
- Understanding the genetic control of leaf morphology is essential for crop improvement.
Purpose of the Study:
- To investigate the genetic basis of leaf shape control in rice.
- To identify and characterize genes involved in leaf blade width determination.
Main Methods:
- Isolation and characterization of the narrow leaf 7 (nal7) mutant in rice.
- Analysis of leaf morphology and cellular structure in wild-type and nal7 plants.
- Gene sequencing and structural modeling of the NAL7 locus.
- Quantification of Indole-3-acetic acid (IAA) content.
- Analysis of NAL7 overexpression effects on root development.
Main Results:
- A spontaneous mutation in the nal7 gene significantly reduced rice leaf width.
- No major cellular changes were observed, except in bulli-form cells.
- The NAL7 gene encodes a flavin-containing monooxygenase homologous to YUCCA.
- The nal7 mutation likely results in an inactive NAL7 enzyme.
- Altered IAA content and abnormal root morphology in nal7 mutants suggest a role in auxin biosynthesis.
Conclusions:
- NAL7 plays a critical role in regulating leaf width in rice.
- NAL7 is involved in auxin biosynthesis, impacting plant growth and development.
- The nal7 mutant provides a valuable tool for studying auxin's role in plant morphology and for crop trait manipulation.
More Related Videos
10:08Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
Published on: March 5, 2017
06:11Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging
Published on: September 22, 2023
Related Concept Videos
Light Acquisition
Cell Signaling in Plants
Primary and Secondary Growth in Roots and Shoots
Plant Hormones
Plant Hormones
Regulation of Transpiration by Stomata