Factors responsible for deep-sowing tolerance in wheat seedlings: varietal differences in cell proliferation and the co-ordinated synchronization of epidermal cell expansion and cortical cell division for the gibberellin-mediated elongation of first internodes |
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Authors: | Kato Fumie Araki Masaru Miyazawa Yutaka Fujii Nobuharu Takeda Kazuyoshi Suge Hiroshi Takahashi Hideyuki |
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Affiliation: | Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan. |
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Abstract: | MethodsThe lengths and numbers of epidermal and cortical cells of the first internodes in three wheat cultivars were measured. These parameters were compared in wheat seedlings treated with gibberellin A3 (GA3) or an inhibitor of GA biosynthesis, uniconazole.ConclusionsThe deep-sowing-tolerant cultivar ‘Hong Mang Mai’ is able to elongate the first internode to a greater degree due to enhanced cell division and a heightened response to GA. In addition, cell expansion in the epidermis and cell division in the cortex are synchronized for the elongation of the first internodes. In response to GA, this well-co-ordinated synchronization yields the rapid elongation of the first internodes in wheat seedlings. |
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Keywords: | Cell expansion cell division deep-sowing tolerance first internode elongation gibberellin (GA) ‘Hong Mang Mai’ Triticum aestivum wheat |
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