Abstract
Recent work on root distribution, growth angles and gravitropic responses in Japanese cultivars of winter wheat are reviewed. Vertical distribution of roots, which influences the environmental stress tolerance of plants, was observed in the 12 Japanese cultivars in the field. The root depth index (RDI: the depth at which 50% of the root length has been reached) differed among the cultivars at the stem elongation stage. Since the RDI was closely related to the growth angle of seminal roots obtained in a pot experiment, it was assumed that growth angle is useful for predicting vertical root distribution among wheat genotypes. Gravitropic responses of the primary seminal root of 133 Japanese wheat cultivars assessed by measuring the growth angle in agar medium, were larger in the northern Japanese cultivars and smaller in the southern ones. It was also found that the geographical variation resulted from the wheat breeding process, i.e. genotypes with limited gravitropic responses of roots had been selected in the southern part of Japan where excessive soil moisture is one of the most serious problems.
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References
Barlow P W, Parker J S, Butler R and Brain P 1993 Gravitropism of primary roots of Zea mays L. at different displacement angles. Ann. Bot. 71, 383–388.
Hurd E A 1974 Phenotype and drought tolerance in wheat. Agric. Meteorol. 14, 39–55.
Morita S, Okuda H and Abe J 1993 Spatial distribution and structure of wheat root system. In Low-Input Sustainable Crop Production Systems in Asia. pp 399–404. KSCS, Korea.
Nakamoto T 1993 Effect of soil water content on the gravitropic behavior of nodal roots in maize. Plant and Soil 152, 261–267.
Nakamoto T and Oyanagi A 1994 The direction of growth of seminal roots of Triticum aestivum L. and experimental modification thereof. Ann. Bot. 73, 363–367.
O'Toole J C and Bland W L 1987 Genotypic variation in crop plant root systems. Adv. Agron. 41, 91–145.
Oyanagi A, Sato A and Wada M 1991 Varietal differences in geotropic response of primary seminal root in Japanese wheat. Jpn. J. Crop Sci. 60, 312–319.
Oyanagi A, Nakamoto T and Morita S 1993 The gravitropic response of roots and the shaping of the root system in cereal plants. Environ. Exp. Bot. 33, 141–158.
Oyanagi A, Nakamoto T and Wada M 1993 Relationship between root growth angle of seedlings and vertical distribution of roots in the field in wheat cultivars. Jpn. J. Crop Sci. 62, 565–570.
Rufelt H 1969 Geo and hydrotropic responses of roots. In Root Growth. Ed. W J Whittington. pp 54–63. Butterworths, London.
Troughton A and Whittington W J 1969 The significance of genetic variation in root systems. In Root Growth. Ed. W J Whittington. pp 296–313. Butterworths, London.
Worzella W W 1932 Root development in hardy and non-hardy winter wheat varieties. J. Am. Soc. Agron. 24, 626–637.
Yamauchi A, Kono Y, Tatsumi J and Inagaki N 1988 Comparison of the capacities of waterlogging and drought tolerances among winter cereals. Jpn. J. Crop Sci. 57, 163–173.
Yu P T, Stolzy L H and Letey J 1969 Survival of plants under prolonged flooded conditions. Agron. J. 61, 844–847.
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Oyanagi, A. Gravitropic response growth angle and vertical distribution of roots of wheat (Triticum aestivum L.). Plant Soil 165, 323–326 (1994). https://doi.org/10.1007/BF00008076
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DOI: https://doi.org/10.1007/BF00008076