Johnsson, A. 1965. Investigations of the reciprocity rule by means of geoptropic and geoelectric
measurements.Physiol. Plant. 18: 945–967.
Johnsson, A., Brown, A.H., Chapman, D.K., Heathcote, D., and C. Karlsson. 1995. Gravitropic re-
sponses of the Avenacoleoptiles in space and on clinostats. II. Is reciprocity valid? Physiol.
Plant. 95: 34–38.
Johnsson, A., Karlsson, C., Chapman, D.K., Braseth, J.D., and T.H. Iversen. 1996a. Dynamics of
root growth in microgravity. J. Biotechnol. 47: 155–165.
Johnsson, A., Karlsson, C., Iversen, T.H., and D.K. Chapman. 1996b. Random movements in
weightlessness. Physiol. Plant. 96: 169–178.
Kern, V.D., Sack, F.D., White, N.J., Anderson, K., Wells, W., and C. Martin. 1999. Spaceflight
hardware allowing unilateral irradiation and chemical fixation in situ in Petri dishes. Adv.
Space Res. 24: 775-778.
Kern, V.D., and F.D. Sack. 2001. Effects of spaceflight (STS-87) on tropisms and plastid position-
ing in protonemata of the moss Ceratodon purpureus.Adv. Space Res. 25: 941-949.
Kern, V.D., Smith, J.D., Schwuchow, J.M., and F.D. Sack. 2001. Amyloplasts that sediment in pro-
tonemata of the moss Ceratodon purpureusare nonrandomly distributed in microgravity. Plant
Physiol. 125: 2085-2094.
Kern, V.D., Schwuchow, J.M. Reed, D.W., Nadeau, J.A., Lucas, J., Skripnikov, A., and F.D. Sack.
- Gravitropic moss cells default to spiral growth on the clinostat and in microgravity dur-
ing spaceflight. Planta 221: 149-157
Kiss, J.Z. 2000. Mechanisms of the early phases of plant gravitropism. Crit. Rev. Plant Sci. 19:
551-573.
Kiss, J.Z. 2006. Up, down, and all around: How plants sense and respond to environmental stim-
uli.Proc. Natl. Acad. Sci. USA 103: 829-830.
Kiss, J.Z., Hertel R., and F.D. Sack. 1989. Amyloplasts are necessary for full gravitropic sensitiv-
ity in roots of Arabidopsis thaliana.Planta 177: 198-206.
Kiss J.Z., Katembe, W.J., and R.E Edelmann. 1998. Gravitropism and development of wild-type
and starch-deficient mutants of Arabidopsisduring spaceflight. Physiol. Plant. 102: 493-502.
Kiss, J.Z., Edelmann, R.E., and P.C. Wood. 1999. Gravitropism of hypocotyls of wild-type and
starch-deficient Arabidopsisseedlings in spaceflight studies. Planta 209: 96-103.
Kiss, J.Z., Miller, K.M., Ogden, L.A., and K.K. Roth. 2002. Phototropism and gravitropism in lat-
eral roots of Arabidopsis.Plant Cell Physiol. 43: 35-43.
Kitazawa, D., Hatakeda, Y., Kamada, M., Fujii, N.M., Miyazawa, Y., Hoshino, A., Iida, S., Fukaki,
H., Morita, M.T., Tasaka, M., Suge, H., and H. Takahashi. 2005. Shoot circumnutation and
winding movements require gravisensing cells. Proc. Natl. Acad. Sci. USA 102: 18742-18747.
Klaus, D.M. 2001. Clinostats and bioreactors. Grav. Space Biol. Bull. 14: 55-64.
Kordyum, E.L. 1997. Biology of plant cells in microgravity and under clinostating. Intl. Rev.
Cytol. 171: 1-78.
Kraft, T.F., Van Loon, J.J., and J.Z. Kiss. 2000. Plastid position in Arabidopsiscolumella cells is
similar in microgravity and on a random-positioning machine. Planta 211: 415-422.
Liao, J., Liu, G., Monje, O., Stutte, G.W., and D.M. Porterfield. 2004. Induction of hypoxic root
metabolism results from physical limitation in O 2 bioavailability in microgravity. Adv. Space
Res. 34: 1579-1584.
Lorenzi, G., and G. Perbal. 1990. Root growth and statocyte polarity in lentil seedling roots grown
in microgravity or on a slowly rotating clinostat. Physiol. Plant. 78: 532-537.
Lork, W. 1988. Experiments and appropriate facilities for plant physiology research in space. Acta
Atronaut. 17: 271-275.
Manieri, P., Brinckmann, E., and C. Brillouet. 1996. The Biorack facility and its performance dur-
ing the IML-2 Spacelab mission. J. Biotechnol. 47: 71-82.