PNPase a 3’ to 5’ exonucleases in E. coli, are unable to progress through double-stranded regions. Thus, the stem-loop structure at the 3’ end of many bacterial mRNAs protects the mRNA from direct 3’ attack.

TLS Online TPP Program

#Id: 7136

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7137

#Unit 6. System Physiology – Plant

BR biosynthetic pathway is a triterpenoid pathway. ls.

TLS Online TPP Program

#Id: 7138

#Unit 6. System Physiology – Plant

They regulate multiple physiological functions including seed germination, cell elongation, cell division, senescence, vascular-differentiation, reproduction, root development, photomorphogenesis, and also respond to various biotic and abiotic stresses.

BR-deficient mutants exhibits extreme dwarfism, altered leaf morphology, abnormal vascular development, delayed flowering and senescence, and reduced male fertility.

TLS Online TPP Program

#Id: 7139

#Unit 6. System Physiology – Plant

Bioactive brassinosteroid levels are also modulated by a variety of inactivation or catabolic reactions, including epimerization, oxidation, hydroxylation, sulfonation, and conjugation to glucose or lipids.

TLS Online TPP Program

#Id: 7140

#Unit 6. System Physiology – Plant

Active brassinosteroids are also regulated by brassinosteroid-dependent negative feedback mechanisms attenuation which is brought about by the downregulation of brassinosteroid biosynthetic genes and the upregulation of genes involved in brassinosteroid catabolism.

TLS Online TPP Program

#Id: 7141

#Unit 6. System Physiology – Plant