SGRL can regulate chlorophyll metabolism and contributes to normal plant growth and development in Pisum sativum L

Plant Molecular Biology
Andrew BellClaire Domoney

Abstract

Among a set of genes in pea (Pisum sativum L.) that were induced under drought-stress growth conditions, one encoded a protein with significant similarity to a regulator of chlorophyll catabolism, SGR. This gene, SGRL, is distinct from SGR in genomic location, encoded carboxy-terminal motif, and expression through plant and seed development. Divergence of the two encoded proteins is associated with a loss of similarity in intron/exon gene structure. Transient expression of SGRL in leaves of Nicotiana benthamiana promoted the degradation of chlorophyll, in a manner that was distinct from that shown by SGR. Removal of a predicted transmembrane domain from SGRL reduced its activity in transient expression assays, although variants with and without this domain reduced SGR-induced chlorophyll degradation, indicating that the effects of the two proteins are not additive. The combined data suggest that the function of SGRL during growth and development is in chlorophyll re-cycling, and its mode of action is distinct from that of SGR. Studies of pea sgrL mutants revealed that plants had significantly lower stature and yield, a likely consequence of reduced photosynthetic efficiencies in mutant compared with control plants under conditi...Continue Reading

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Citations

Nov 25, 2018·The Plant Journal : for Cell and Molecular Biology·Ying ChenAyumi Tanaka
Mar 21, 2020·International Journal of Molecular Sciences·Endale G TafesseThomas D Warkentin

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Datasets Mentioned

BETA
AJ831475.1
EBI
AM161647-AM162203
GQ497237.1
LN810021
AM162161

Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

TMHMM
ClustalW2
Excel
JoinMap
BlastP
Cameor
GenStat
LIS
GATEWAY
THREaD Mapper

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