Information report for SGR;OsSGR
Gene Details
|
|
Functional Descriptions
- SGR, like the gene for pheophorbide a oxygenase (PaO), was constitutively expressed, but was upregulated by dark-induced senescence in rice leaves.
- Senescence-induced expression of SGR and PaO was enhanced by ABA, but inhibited by cytokinin.
- This indicates that upregulation of SGR increases Chl breakdown during senescence in rice.
- A small quantity of chlorophyllide a accumulated in SGR leaves, but this also accumulated in wild-type rice leaves during senescence.
- In this study, we found that overexpression of SGR (Ov-SGR) resulted in the generation of singlet oxygen and other reactive oxygen species and produced a chlorophyll-dependent regional cell death phenotype on leaves of rice seedlings.
- Transcriptome analyses using Affymetrix Rice GeneChips revealed that Ov-SGR rice seedlings exhibited a number of signs of singlet oxygen response.
- Overexpression of SGR results in oxidative stress and lesion-mimic cell death in rice seedlings.
- The Stay-Green Rice (SGR) protein is encoded by the SGR gene and has been shown to affect chlorophyll (Chl) degradation during natural and dark-induced leaf senescence.
- We show that SGRL is primarily expressed in green tissues, and is significantly downregulated in rice leaves undergoing natural and dark-induced senescence.
- Overexpression of SGRL reduces the levels of Chl and Chl-binding proteins in leaves, and accelerates their degradation in dark-induced senescence leaves in rice.
- The gene, designated Stay Green Rice (SGR), was cloned by a positional cloning strategy encoding an ancient protein containing a putative chloroplast transit peptide.
- It is thought that the Stay Green Rice (SGR) gene is involved in the disaggregation of the light harvesting complex and in the subsequent breakdown of chlorophyll and apo-protein during senescence.
- Promoter variations in the Stay-Green (OsSGR) gene encoding the chlorophyll-degrading Mg++-dechelatase were found to trigger higher and earlier induction of OsSGR in indica, which accelerated senescence of indica rice cultivars.
- Japonica OsSGR alleles introgressed into indica-type cultivars in Korean rice fields lead to delayed senescence, with increased grain yield and enhanced photosynthetic competence.
- Taken together, these data establish that naturally occurring OsSGR promoter and related lifespan variations can be exploited in breeding programs to augment rice yield.
Functional Keywords
- senescence , seedling , oxidative , leaf , cytokinin , chloroplast , cell-death , grain , grain-yield , yield , breeding
Literature and News
- The Stay-Green Rice like (SGRL) gene regulates chlorophyll degradation in rice . DOI: 10.1016/j.jplph.2013.05.016 ; PMID: 23816327
- Molecular cloning and function analysis of the stay green gene in rice . DOI: 10.1111/j.1365-313X.2007.03221.x ; PMID: 17714430
- Overexpression of SGR results in oxidative stress and lesion-mimic cell death in rice seedlings . DOI: 10.1111/j.1744-7909.2011.01037.x ; PMID: 21375689
- Natural variations at the Stay-Green gene promoter control lifespan and yield in rice cultivars . DOI: 10.1038/s41467-020-16573-2 ; PMID: 32499482
- Characterization of a novel allele encoding pheophorbide a oxygenase in rice . DOI: 10.1080/15592324.2020.1864606 ; PMID: 33369525
Gene Resources
- UniProt: Q652K1
- EMBL: AK105810, AP005314, AP005567
- AlphaFoldDB: Q652K1
- EnsemblPlants: Os09t0532000-01
- Gramene: Os09t0532000-01
- KEGG: dosa:Os09g0532000
- Orthologous matrix: VGEWPHR
- InterPro: IPR010916, IPR024438
- PANTHER: PTHR31750, PTHR31750:SF4
- OrthoDB: Q652K1
- SWISS-MODEL: Q652K1
- eggNOG: ENOG502QV01
Sequences
cDNA Sequence
- >LOC_Os09g36200.1
AATCACCAACCTGCAGCGAGCTGAACTGACTGAGAAGCCAATCCGCGAAGCTACCAAACCGAGCCAAAATTTTGATCGATCGATCGGCCGGCCGGTGTCTTTGTTGAGGCGTGCAAGGCTCGTGCTTTCGCCGAGAGGGATTAATTAGCCGCGCCTCCAGCATCTCCGGCCTCCATAGAGATCCCAGCTTATAATTAAAGCTGTCAAGAGTCGTTTTGGTTGTTAGGCTTAAAGTTAACTACTGCTGGCTAGCTAGGACTAAGAGATCCGAGGGAGCAGACATGGCTGCTGCTACTTCGACCATGTCCCTGCTTCCTCCCATCACCCAGCAGCAGCGGTGGCACGCCGCCGACTCCCTCGTCGTCCTCGCCTCCCGCTGCCACAACTCTCGCCGCCGCCGCCGCTGCCGCTACGTCGTGCCGAGGGCGAGGCTGTTCGGGCCGGCGATCTTCGAGGCGTCGAAGCTGAAGGTGCTGTTCCTGGGGGTGGACGAGGAGAAGCACCAGCACCCGGGGAAGCTGCCGCGGACGTACACGCTGACGCACAGCGACGTGACGGCGAGGCTGACGCTGGCGGTGTCGCACACCATCAACCGGGCGCAGCTGCAGGGGTGGTACAACAAGCTGCAGCGGGACGAGGTGGTGGCGGAGTGGAAGAAGGTGCAGGGCCACATGTCGCTGCACGTCCACTGCCACATCTCCGGCGGCCACGTCCTCCTCGACCTCATCGCCGGCCTCCGCTACTACATCTTCCGCAAGGAGCTCCCCGTGGTTCTGAAGGCGTTCGTCCACGGCGACGGCAACCTGTTCAGCCGGCACCCGGAGCTGGAGGAGGCCACGGTGTGGGTCTACTTCCACTCCAACCTCCCACGCTTCAACCGCGTCGAGTGCTGGGGCCCGCTCCGCGACGCCGGAGCGCCGCCCGAGGAAGACGACGCCGTCGCCGCCGCGGCGGCCGAGGAGGCGGCGGCGGAGCAGATGCCCGCGGCCGGCGAGTGGCCGCGGCGGTGCCCGGGGCAGTGCGACTGCTGCTTCCCGCCATACAGCCTCATCCCCTGGCCGCACCAGCACGACGTCGCCGCCGCCGACGGCCAGCCGCAGCAGTGACGGCGGCGCCGCCGCGATTCGTAGATTAGCGAATTCGTTTGGTTGCCATGGTACACCTACACGCATGCAATGTCGCCAAATGACGCTGCGTGCTTTGCGTTAAATTCTTTAATTATTCGTAGTGGCATTTAGCTCAGCTCAGCTCAGCTCTGCAATTAGCACATATTTGATTAGCTTTAGGGAATGAGTGTGGTGAGCTTGTAAATAGAAGAACACTAGTAGATGGCAAGCAAATGGAAACGATCGATGATGCAGTAGATGTTACTGCAAAAATGGCAATTATTAGATGAAGTCGACACACAAAGACAGATCTCGTTTCATTTGTACATTCTACAGTCTACGTCGATGAGGACATGACTGGATTTGTATAGCAAATTAGTACTAGCAGCTAATAAGTGTGGATTAATTATGAAACACGATTGTTTAATTA
CDS Sequence
- >LOC_Os09g36200.1
ATGGCTGCTGCTACTTCGACCATGTCCCTGCTTCCTCCCATCACCCAGCAGCAGCGGTGGCACGCCGCCGACTCCCTCGTCGTCCTCGCCTCCCGCTGCCACAACTCTCGCCGCCGCCGCCGCTGCCGCTACGTCGTGCCGAGGGCGAGGCTGTTCGGGCCGGCGATCTTCGAGGCGTCGAAGCTGAAGGTGCTGTTCCTGGGGGTGGACGAGGAGAAGCACCAGCACCCGGGGAAGCTGCCGCGGACGTACACGCTGACGCACAGCGACGTGACGGCGAGGCTGACGCTGGCGGTGTCGCACACCATCAACCGGGCGCAGCTGCAGGGGTGGTACAACAAGCTGCAGCGGGACGAGGTGGTGGCGGAGTGGAAGAAGGTGCAGGGCCACATGTCGCTGCACGTCCACTGCCACATCTCCGGCGGCCACGTCCTCCTCGACCTCATCGCCGGCCTCCGCTACTACATCTTCCGCAAGGAGCTCCCCGTGGTTCTGAAGGCGTTCGTCCACGGCGACGGCAACCTGTTCAGCCGGCACCCGGAGCTGGAGGAGGCCACGGTGTGGGTCTACTTCCACTCCAACCTCCCACGCTTCAACCGCGTCGAGTGCTGGGGCCCGCTCCGCGACGCCGGAGCGCCGCCCGAGGAAGACGACGCCGTCGCCGCCGCGGCGGCCGAGGAGGCGGCGGCGGAGCAGATGCCCGCGGCCGGCGAGTGGCCGCGGCGGTGCCCGGGGCAGTGCGACTGCTGCTTCCCGCCATACAGCCTCATCCCCTGGCCGCACCAGCACGACGTCGCCGCCGCCGACGGCCAGCCGCAGCAGTGA
Protein Sequence
- >LOC_Os09g36200.1
MAAATSTMSLLPPITQQQRWHAADSLVVLASRCHNSRRRRRCRYVVPRARLFGPAIFEASKLKVLFLGVDEEKHQHPGKLPRTYTLTHSDVTARLTLAVSHTINRAQLQGWYNKLQRDEVVAEWKKVQGHMSLHVHCHISGGHVLLDLIAGLRYYIFRKELPVVLKAFVHGDGNLFSRHPELEEATVWVYFHSNLPRFNRVECWGPLRDAGAPPEEDDAVAAAAAEEAAAEQMPAAGEWPRRCPGQCDCCFPPYSLIPWPHQHDVAAADGQPQQ*