Scholarlink

<p>Grape ripe rot (GRR), primarily caused by <i>Colletotrichum</i> species, severely affects grape production and wine quality, especially under the favorable climatic conditions of southern Brazil. This study aimed to investigate the relationship between berry skin morpho-anatomical traits, polyphenol content, and GRR severity in 13 grapevine genotypes, eight of which have genes that confer resistance to powdery and downy mildew. Pathogenicity bioassays were conducted using an isolate from the <i>C. acutatum</i> species complex, applied under various inoculation methods across four crop seasons (2019–2022). Scanning electron microscopy (SEM) revealed clear structural degradation in symptomatic berries, particularly in susceptible varieties like Sauvignon Blanc and Merlot. Conversely, resistant genotypes such as PI4407 and Bronner exhibited thicker cuticles and intact epidermal layers. Biochemical analysis showed that polyphenol content tended to increase in response to higher disease severity, especially in Regent and Prior. However, naturally resistant varieties like Concord and Calardis Blanc maintained low disease progression and low polyphenol accumulation, suggesting alternative defense mechanisms. Statistical analysis of the Area Under the Disease Progress Curve (AUDPC) and polyphenol concentration confirmed genotype-specific responses to infection and stress. These findings reinforce the potential of combining anatomical and biochemical markers to guide breeding programs and improve disease management strategies in viticulture.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Involvement of grape berry morpho-anatomy and polyphenol content with the severity of grape ripe rot

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月11日

查看全文
  • Andressa Hilha,
  • Marcia Regina Faita,
  • Renata Ferreira Medeiros,
  • Francesco Bianchini Orlandini,
  • Marceli Raquel Burin,
  • Eliana de Medeiros de Oliveira,
  • Jonathan Eduardo Giehl Muller,
  • Valdecir Perazzoli,
  • Daniel Ricardo Maass. Steiner,
  • Marco Antônio Dalbo,
  • Rubens Onofre Nodari

摘要

Grape ripe rot (GRR), primarily caused by Colletotrichum species, severely affects grape production and wine quality, especially under the favorable climatic conditions of southern Brazil. This study aimed to investigate the relationship between berry skin morpho-anatomical traits, polyphenol content, and GRR severity in 13 grapevine genotypes, eight of which have genes that confer resistance to powdery and downy mildew. Pathogenicity bioassays were conducted using an isolate from the C. acutatum species complex, applied under various inoculation methods across four crop seasons (2019–2022). Scanning electron microscopy (SEM) revealed clear structural degradation in symptomatic berries, particularly in susceptible varieties like Sauvignon Blanc and Merlot. Conversely, resistant genotypes such as PI4407 and Bronner exhibited thicker cuticles and intact epidermal layers. Biochemical analysis showed that polyphenol content tended to increase in response to higher disease severity, especially in Regent and Prior. However, naturally resistant varieties like Concord and Calardis Blanc maintained low disease progression and low polyphenol accumulation, suggesting alternative defense mechanisms. Statistical analysis of the Area Under the Disease Progress Curve (AUDPC) and polyphenol concentration confirmed genotype-specific responses to infection and stress. These findings reinforce the potential of combining anatomical and biochemical markers to guide breeding programs and improve disease management strategies in viticulture.