Anatomy of Swollen Rachis and Its Effects on Berry Growth of 'Muscat of Alexandria' Grapes

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  • マスカット•オブ•アレキサンドリア'の穂軸肥厚症の発生とその症状
  • "マスカット・オブ・アレキサンドリア"の穂軸肥厚症の発生とその症状〔英文〕
  • マスカット オブ アレキサンドリア ノ ホジク ヒコウショウ ノ ハッセイ ト

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Abstract

Abnormal swelling of the rachis of 'Muscat of Alexandria' grapevines grown in a heated glasshouse was investigated. The swelling became apparent at the peduncular node or along the rachis three to four weeks after full bloom. Berry growth was inhibited thereafter with the degree of inhibition varying among clusters. Anatomical studies revealed that a mass of small parenchyma cells divided among or around the phloem tissue two to four weeks after anthesis, which stymied further development of sieve tubes. Numerous granules (0.52.0 μm in diam.) were observed in these meristematic cells under SEM.

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