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Science 25 October 1985:
Vol. 230. no. 4724, pp. 445 - 447
DOI: 10.1126/science.230.4724.445
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Articles

A Pea Mutant for the Study of Hydrotropism in Roots

M. J. JAFFE 1, H. TAKAHASHI 1, and R. L. BIRO 2

1 Department of Biology, Wake Forest University, Winston-Salem, North Carolina 27109
2 Biomedical and Environmental Laboratories, The Bionetics Corporation, Kennedy Space Center, Florida 32899

Plant roots grow in the direction of increasing soil moisture, but studies of hydrotropism have always been difficult to interpret because of the effect of gravity. In this study it was found that roots of the mutant pea `Ageotropum' are neither gravitropic nor phototropic, but do respond tropically to a moisture gradient, making them an ideal subject for the study of hydrotropism. When the root caps were removed, elongation was not affected but hydrotropism was blocked, suggesting that the site of sensory perception resides in the root cap.

Submitted on May 20, 1985
Accepted on August 7, 1985


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Plant Physiology 149, 835-840
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Salt Modulates Gravity Signaling Pathway to Regulate Growth Direction of Primary Roots in Arabidopsis.
F. Sun, W. Zhang, H. Hu, B. Li, Y. Wang, Y. Zhao, K. Li, M. Liu, and X. Li (2008)
Plant Physiology 146, 178-188
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From the Cover: A gene essential for hydrotropism in roots.
A. Kobayashi, A. Takahashi, Y. Kakimoto, Y. Miyazawa, N. Fujii, A. Higashitani, and H. Takahashi (2007)
PNAS 104, 4724-4729
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Where's the water? Hydrotropism in plants.
J. Z. Kiss (2007)
PNAS 104, 4247-4248
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Auxin response, but not its polar transport, plays a role in hydrotropism of Arabidopsis roots.
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J. Exp. Bot. 58, 1143-1150
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The Root Tip and Accelerating Region Suppress Elongation of the Decelerating Region without any Effects on Cell Turgor in Primary Roots of Maize under Water Stress.
Y. Shimazaki, T. Ookawa, and T. Hirasawa (2005)
Plant Physiology 139, 458-465
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Roots of Pisum sativum L. Exhibit Hydrotropism in Response to a Water Potential Gradient in Vermiculite.
S. TSUDA, N. MIYAMOTO, H. TAKAHASHI, K. ISHIHARA, and T. HIRASAWA (2003)
Ann. Bot. 92, 767-770
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A no hydrotropic response Root Mutant that Responds Positively to Gravitropism in Arabidopsis.
D. Eapen, M. L. Barroso, M. E. Campos, G. Ponce, G. Corkidi, J. G. Dubrovsky, and G. I. Cassab (2003)
Plant Physiology 131, 536-546
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Hydrotropic Response and Expression Pattern of Auxin-Inducible Gene, CS-IAA1, in the Primary Roots of Clinorotated Cucumber Seedlings.
H. Mizuno, A. Kobayashi, N. Fujii, M. Yamashita, and H. Takahashi (2002)
Plant Cell Physiol. 43, 793-801
   Abstract »    Full Text »    PDF »
Water Uptake and Hydraulic Properties of Elongating Cells in Hydrotropically Bending Roots of Pisum sativum L..
N. Miyamoto, T. Ookawa, H. Takahashi, and T. Hirasawa (2002)
Plant Cell Physiol. 43, 393-401
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