TY - JOUR
T1 - Morphogenesis in cucumber seedlings is negatively controlled by gravity
AU - Takahashi, Hideyuki
AU - Kamada, Motoshi
AU - Yamazaki, Yutaka
AU - Fujii, Nobuharu
AU - Higashitani, Atsushi
AU - Aizawa, Sachiko
AU - Yoshizaki, Izumi
AU - Kamigaichi, Shigeki
AU - Mukai, Chiaki
AU - Shimazu, Toru
AU - Fukui, Keiji
N1 - Funding Information:
We thank crew of the STS-95 for operating our experiments. The authors are grateful to A. Kobayashi, M. Takano, S. Yamasaki, T. Sakata, M. Furukawa, A. Nishiyama, N. Sakurai, K. Norwood, H. Suge, H. Matsushima, T. Murata, Y. Kaneko, M. Yamashita and H. Matsumiya for their assistance, advice and discussion. Space agencies of Japan and USA (NASDA, Japan Space Forum and NASA), Japan Manned Space System Co., SpaceHab Inc. and Bionetics Co. are acknowledged for their kind considerations and help during the spaceflight experiment. This work was supported by grants from NASDA, Japan Space Forum and the Institute of Astronautical Science (Sagamihara, Japan). We also thank J.Z. Kiss, Miami Univ. (Oxford, Ohio) and S. Kamisaka, Osaka City Univ. (Osaka) for their reading of our manuscript.
PY - 2000/2
Y1 - 2000/2
N2 - Seedlings of most cucurbitaceous plants develop a peg (protuberance caused by cell outgrowth) on the transition zone between the hypocotyl and root. The peg is necessary for removing the seed coat after germination. In our spaceflight experiments on the STS-95 space shuttle, Discovery, we found thai cucumber (Cucumis sativus L.) seedlings grown under microgravity conditions developed two pegs symmetrically at the transition zone. Thus, cucumber seedlings potentially develop two pegs and do not require gravity for peg formation itself, but on the ground the development of one peg is suppressed in response to gravity. This may be considered as negative control of morphogenesis by gravity.
AB - Seedlings of most cucurbitaceous plants develop a peg (protuberance caused by cell outgrowth) on the transition zone between the hypocotyl and root. The peg is necessary for removing the seed coat after germination. In our spaceflight experiments on the STS-95 space shuttle, Discovery, we found thai cucumber (Cucumis sativus L.) seedlings grown under microgravity conditions developed two pegs symmetrically at the transition zone. Thus, cucumber seedlings potentially develop two pegs and do not require gravity for peg formation itself, but on the ground the development of one peg is suppressed in response to gravity. This may be considered as negative control of morphogenesis by gravity.
KW - Cucumis (peg formation)
KW - Gravity
KW - Microgravity
KW - Morphogenesis (negative control) Peg formation
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U2 - 10.1007/s004250050039
DO - 10.1007/s004250050039
M3 - Article
C2 - 10750911
AN - SCOPUS:17644447838
SN - 0032-0935
VL - 210
SP - 515
EP - 518
JO - Planta
JF - Planta
IS - 3
ER -