Determine Timing and Differentiation Stages of Grapevine Buds (Vitis vinifera, L.) cv. Superior Seedless. | ||
| Horticulture Research Journal | ||
| Volume 3, Issue 7, September 2025, Pages 76-90 PDF (818.5 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/hrj.2025.464172 | ||
| Authors | ||
| Nesma M. Alam El-Deen1; A.T. Salem1; M.A. Abdel-Mohsen1; A. Sabbour2 | ||
| 1Department of Pomology, Faculty of Agriculture, Cairo University, Giza, Egypt | ||
| 2Department of Botany, Faculty of Agriculture, Cairo University, Giza, Egypt | ||
| Abstract | ||
| This experiment was conducted during 2018, 2019 and 2020 seasons to determine the timing of the differentiation stages of grapevine cv. Superior Seedless planted in a commercial vineyard Alexandria Road, Giza, Egypt, by defining the developmental phase of initiation and differentiation relative to the time of year and the phenological stages through a histology study on the latent compound bud (N+2). The results obtained showed that on the first week of May (during fruit set stage) - after 10 weeks from bud break (BB), the first changing from vegetative to fruitful bud was recorded which distinguished by formation of anlagen (An) indicating to the initiation phase. The differentiation phase started in the middle of May (during veraison stage) by division of anlagen to form the first bract (B) subtending the main axis of inflorescence primordial (IP). On the second week of August observation showed a primary bud (N+2) with a full differentiated inflorescence (IP). The second (IP) completed its differentiation in the first week of September. The second IP differentiation needs three weeks after the first, no change in number of inflorescences until January. Which means, primary bud (N+2) needs about (120 days) to complete its differentiation starting from the initiation phase, and (195 days) from (BB). Grape grower should take these results in consideration when planning to agriculture practices for Superior Seedless according to its differentiation time. We suggest carrying out bud dissection as a common procedure for grapevine cultivars which have an economic importance. | ||
| Keywords | ||
| Grapevine; Anlagen; Initiation; Differentiation; Inflorescence primordial | ||
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