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<p>The exogenous application of phosphorus-solubilizing bacteria prior to potato (<i>Solanum tuberosum</i> L.) planting has been widely associated with improved tuber growth and development. However, their effects on postharvest quality remain largely unexplored. This study hypothesized that postharvest quality of potatoes may vary depending on the bacterial strain applied. This study evaluated the effects of pre-planting inoculation of seed tubers with phosphorus-solubilizing bacteria on the postharvest quality of the resulting potato tubers. First, cluster analysis was conducted during storage, grouping samples according to variation in firmness and hue angle. This analysis revealed three distinct groups, one of which (the elite group) comprised 7 inoculants at time zero (T0) as well as after 120&#xa0;days (T120), and this group resulted in potatoes with a lower incidence of greening and greater firmness. Subsequently, this group of bacteria previously identified as 'elite' for superior firmness and color was evaluated. Strains 5 (EpD1-4), 36 (EpS4-11), and 52 (MGB2281) showed better preservation of tuber color and firmness. In contrast, strain 71 (MGB1370) was characterized by a higher starch content and lower sugar and total soluble solid levels. This study demonstrated that phosphorus-solubilizing bacteria positively influence the postharvest quality of potatoes, indicating that pre-planting application is beneficial for improving tuber preservation. Additionally, some strains showed potential for use in potatoes intended for industrial processing. Overall, the hypothesis was substantiated, thereby facilitating future research on other potato varieties and crops. The strains should be considered not only for improving agronomic performance but also for enhancing post-harvest quality, contributing to the sustainability of production systems.</p>

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Impact of Pre-planting Inoculation with Phosphorus-solubilizing Bacteria on Potato Tuber Quality during Storage

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Tainá Ferreira da Rocha,
  • Fernando Angelo Piotto,
  • Maria Carolina Quecine,
  • Carlos Alberto Quiloango-Chimarro,
  • Jéfferson de Oliveira Costa,
  • Ralph Bonandi Barreiros,
  • Marcos Fabián Sanabria Franco,
  • Ricardo Alfredo Kluge

摘要

The exogenous application of phosphorus-solubilizing bacteria prior to potato (Solanum tuberosum L.) planting has been widely associated with improved tuber growth and development. However, their effects on postharvest quality remain largely unexplored. This study hypothesized that postharvest quality of potatoes may vary depending on the bacterial strain applied. This study evaluated the effects of pre-planting inoculation of seed tubers with phosphorus-solubilizing bacteria on the postharvest quality of the resulting potato tubers. First, cluster analysis was conducted during storage, grouping samples according to variation in firmness and hue angle. This analysis revealed three distinct groups, one of which (the elite group) comprised 7 inoculants at time zero (T0) as well as after 120 days (T120), and this group resulted in potatoes with a lower incidence of greening and greater firmness. Subsequently, this group of bacteria previously identified as 'elite' for superior firmness and color was evaluated. Strains 5 (EpD1-4), 36 (EpS4-11), and 52 (MGB2281) showed better preservation of tuber color and firmness. In contrast, strain 71 (MGB1370) was characterized by a higher starch content and lower sugar and total soluble solid levels. This study demonstrated that phosphorus-solubilizing bacteria positively influence the postharvest quality of potatoes, indicating that pre-planting application is beneficial for improving tuber preservation. Additionally, some strains showed potential for use in potatoes intended for industrial processing. Overall, the hypothesis was substantiated, thereby facilitating future research on other potato varieties and crops. The strains should be considered not only for improving agronomic performance but also for enhancing post-harvest quality, contributing to the sustainability of production systems.