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<p>Waterlogging may attenuate the physiological performance and can cause plant death in commercial papaya plants after 72&#xa0;h. On the other hand, wild-native <i>Carica papaya</i> L. plants that can be found in remote areas of the southeast of México may differ from commercial papaya in both morphological and physiological responses to abiotic disturbances. We&#xa0;evaluated the physiological performance of a commercial papaya genotype exposed to waterlogging&#xa0;conditions and compared them with that of a wild papaya genotype (collected at Yucatán, México). The wild papaya genotype showed less damage than the commercial one when exposed to waterlogging conditions, maintaining more turgid leaves and being able to recover when the&#xa0;waterlogging was removed. Wild papaya plants exhibited less membrane damage and lower damage to the photosynthetic apparatus, exhibiting reduced damage to electron transport chain (PSII) and better responses in OJIP curves as well as higher dissolved oxygen concentration (DO) than the commercial ones. Correlation analyses suggested that gas exchange responses were more closely related to the decreased DO than to the plant water status during waterlogging. These results suggest that wild papaya was more resilient to waterlogging than its commercial counterpart, highlighting the importance of preserving and studying native-wild papaya populations at their center of origin. These results may be eventually important in breeding programs aiming to improve the waterlogging resilience of this important tropical fruit species.</p>

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Wild Carica papaya genotype is more waterlogging resilient than its commercial counterpart

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • Nelly A. González-Oviedo,
  • Gabriela Fuentes-Ortíz,
  • Jorge M. Santamaría

摘要

Waterlogging may attenuate the physiological performance and can cause plant death in commercial papaya plants after 72 h. On the other hand, wild-native Carica papaya L. plants that can be found in remote areas of the southeast of México may differ from commercial papaya in both morphological and physiological responses to abiotic disturbances. We evaluated the physiological performance of a commercial papaya genotype exposed to waterlogging conditions and compared them with that of a wild papaya genotype (collected at Yucatán, México). The wild papaya genotype showed less damage than the commercial one when exposed to waterlogging conditions, maintaining more turgid leaves and being able to recover when the waterlogging was removed. Wild papaya plants exhibited less membrane damage and lower damage to the photosynthetic apparatus, exhibiting reduced damage to electron transport chain (PSII) and better responses in OJIP curves as well as higher dissolved oxygen concentration (DO) than the commercial ones. Correlation analyses suggested that gas exchange responses were more closely related to the decreased DO than to the plant water status during waterlogging. These results suggest that wild papaya was more resilient to waterlogging than its commercial counterpart, highlighting the importance of preserving and studying native-wild papaya populations at their center of origin. These results may be eventually important in breeding programs aiming to improve the waterlogging resilience of this important tropical fruit species.