TY - JOUR
T1 - Plasma membrane-anchored chloroplasts are necessary for the gravisensing system of Ceratopteris richardii prothalli
AU - Kamachi, Hiroyuki
AU - Tamaoki, Daisuke
AU - Karahara, Ichirou
N1 - Publisher Copyright:
© 2016, The Botanical Society of Japan and Springer Japan.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - The prothalli of the fern Ceratopteris richardii exhibit negative gravitropism when grown in darkness. However, no sedimentable organelles or substances have been detected in the prothallial cells, suggesting that a non-sedimentable gravisensor exists. We investigated whether chloroplasts are involved in the gravisensing system of C. richardii prothalli. We used a clumped-chloroplast mutant, clumped chloroplast 1 (cp1), in which the chloroplasts are detached from the plasma membrane and clustered around the nucleus likely because of a partial deletion in the KINESIN-LIKE PROTEIN FOR ACTIN-BASED CHLOROPLAST MOVEMENT 1 gene. The cp1 mutation resulted in prothalli that had a significantly diminished gravitropic response, while the phototropic response occurred normally. These results suggest that plasma membrane-anchored chloroplasts in prothallial cells function as one of the gravisensors in C. richardii prothalli.
AB - The prothalli of the fern Ceratopteris richardii exhibit negative gravitropism when grown in darkness. However, no sedimentable organelles or substances have been detected in the prothallial cells, suggesting that a non-sedimentable gravisensor exists. We investigated whether chloroplasts are involved in the gravisensing system of C. richardii prothalli. We used a clumped-chloroplast mutant, clumped chloroplast 1 (cp1), in which the chloroplasts are detached from the plasma membrane and clustered around the nucleus likely because of a partial deletion in the KINESIN-LIKE PROTEIN FOR ACTIN-BASED CHLOROPLAST MOVEMENT 1 gene. The cp1 mutation resulted in prothalli that had a significantly diminished gravitropic response, while the phototropic response occurred normally. These results suggest that plasma membrane-anchored chloroplasts in prothallial cells function as one of the gravisensors in C. richardii prothalli.
KW - Ceratopteris richardii
KW - Fern gametophyte
KW - Gravitropism
KW - Gravity perception
UR - http://www.scopus.com/inward/record.url?scp=85006427530&partnerID=8YFLogxK
U2 - 10.1007/s10265-016-0889-x
DO - 10.1007/s10265-016-0889-x
M3 - 学術論文
C2 - 27988818
AN - SCOPUS:85006427530
SN - 0918-9440
VL - 130
SP - 397
EP - 405
JO - Journal of Plant Research
JF - Journal of Plant Research
IS - 2
ER -