Premium
Salt‐induced chloroplast protrusion is the process of exclusion of ribulose‐1,5‐bisphosphate carboxylase/oxygenase from chloroplasts into cytoplasm in leaves of rice
Author(s) -
YAMANE KOJI,
MITSUYA SHIRO,
TANIGUCHI MITSUTAKA,
MIYAKE HIROSHI
Publication year - 2012
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.2012.02516.x
Subject(s) - rubisco , chloroplast , vacuole , cytoplasm , ribulose 1,5 bisphosphate , oxygenase , pyruvate carboxylase , biology , ribulose , biochemistry , photosynthesis , microbiology and biotechnology , chemistry , biophysics , botany , enzyme , gene
Chloroplast protrusions (CPs) are often observed under environmental stresses, but their role has not been elucidated. The formation of CPs was observed in the leaf of rice plants treated with 75 m m NaCl for 14 d. Some CPs were almost separated from the main chloroplast body. In some CPs, inner membrane structures and crystalline inclusions were included. Similar structures surrounded by double membranes were observed in the cytoplasm and vacuole. Ribulose 1,5‐bisphosphate carboxylase/oxygenase (Rubisco) was detected in CPs and the similar structures in the cytoplasm and vacuole. These results suggest that CP is one of the pathways of Rubisco exclusion from chloroplasts into the cytoplasm under salinity, and the exclusions could be transported to vacuole for their degradation.