Effects of shoot pinching and boron spray on the nutrient content and berry set of Muscat of Alexandria. I

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  • Muscat of Alexandria における摘心およびホウ素の葉面散布が体内栄養ならびに結実に及ぼす影響 (第1報)
  • Muscat of Alexandriaにおける摘心およびホウ素の葉面散布が体内栄養ならびに結実に及ぼす影響-1-
  • Muscat of Alexandria ニ オケル テキシン オヨビ ホウソ ノ ヨウメン サンプ ガ タイナイ エイヨウ ナラビニ ケツジツ ニ オヨボス エイキョウ 1

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1. In Muscat of Alexandria grapes, strong fruiting shoots each of which had been allowed to bear only one blossom cluster, were pinched one to three weeks before blooming, so as to have 5 or 10 leaves at their basal part. Then, pollen germination and berry set were both greatly promoted, being accompanied with a marked increase of B leaf content near the cluster.<br>2. When boron (H3BO3 0.2%) was sprayed instead of pinching on the strong fruiting shoots before blooming, pollens germinated more actively and berries set better, their leaves containing more abundant B.<br>3. In the paper chromatography of anther extracts for amino acid and sugar, asparagine was determined only in the untreated plot, and proline and alanine were found more quantitatively both in the pinched and the boron sprayed plots.<br>4. Total sugar content of anthers increased much in either plot of pinching or boron spray. In the pinched plot both sucrose and glucose increased, while in the boron sprayed plot sucrose disappeared and glucose increased greatly.

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