Effect of Ethephon on the Harvest Index and Grain Weight of Hokkaido-Bred Wheat Cultivar "Haruyutaka" Grown in a Warm Area of Western Japan
Effect of Ethephon on the Harvest Index and Grain Weight of Hokkaido-Bred Wheat Cultivar "Haruyutaka" Grown in a Warm Area of Western Japan
复制标题
乙烯利对西日本温暖地区北海道小麦品种“春丰”收获指数和粒重的影响
DOI：
10.1626/jcs.71.488
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发表时间：
2002
影响因子：
--
通讯作者：
Tadashi Takahashi
中科院分区：
文献类型：
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作者：
Tadashi Takahashi
在北海道培育的小麦品种“春丰”在日本山口县生长时，收获指数、粒重和产量都很小。乙烯利是一种生长调节剂，施于小麦冠层表面，可望缩短小麦秆，并将由此产生的剩余同化物转移到籽粒中，从而增加收获指数、粒重和产量。在这项研究中，我们种植了两个小麦品种，Haruyutaka和Daichinominori（九州育成）在山口县以400粒/m ~ 2和100粒/m ~ 2两种播种密度，从旗叶期到开花期每隔3天在冠层上喷施100 ppm乙烯利，以提高收获指数。乙烯利使两个品种的茎缩短，但对收获指数无影响。粒重或产量。秆长的减少不是由于缩短了秆的伸长期，而是由于降低了秆的伸长速率。乙烯利处理使茎杆缩短，使茎杆中剩余同化物积累，提高了茎杆中水溶性碳水化合物的含量。然而，WSC不用于谷粒生长，因为它保留在秆中直到成熟。
A wheat cultivar "Haruyutaka" bred in Hokkaido has a small harvest index, grain weight and yield when it grows in Yamaguchi, Japan. Ethephon, a growth regulator, applied to the surface of wheat canopy is expected to shorten the wheat culm and translocate the resulting surplus assimilate to the grain resulting in the increase of harvest index, grain weight and yield. In this study, we planted two wheat cultivars, Haruyutaka and Daichinominori (bred in Kyushu), at two sowing densities, 400 and 100 seeds m-2 in Yamaguchi, and sprayed 100 ppm ethephon on the canopy once every three days from flag leaf stage to anthesis with the intention of improving the harvest index Ethephon shortened the culms of both cultivars, but gave no effect on harvest index, grain weight or yield. Culm length was reduced not by shortening the culm elongation period but by reducing the culm elongation rate. The shortening of the culm by ethephon treatment resulted in the accumulation of surplus assimilate in the culm, and increased the percentage of water-soluble carbohydrate (WSC) in the culm. However, the WSC was not used for grain growth, because it remained in the culm until maturity.