AI Article Synopsis

  • - High temperatures lead to early grape leaf aging, softening of berries, and reduced fruit production, negatively impacting grape quality and yield.
  • - The study evaluated the effects of different shade nets (green, blue, black, gray) on "Jumeigui" grapes, with gray nets showing the best light transmission and cooling effects, thereby alleviating heat-related softness in the grapes.
  • - Quality assessments indicated that TSS levels were sufficiently high (exceeding 18 °Brix) for gray, blue, and green nets, while unshaded grapes suffered from heat stress; overall, gray and blue nets produced superior grape quality compared to black nets.

Article Abstract

High temperature causes premature grape leaf senescence, abnormal berry softening, and shortening of the fruiting period. Furthermore, the fruit quality and yield are severely affected. Here, the "Jumeigui" grape quality and leaf senescence were evaluated under shading; green, blue, black, and gray nets were used for shading, and their spectra were measured. At the same density, the shade-net color significantly affected cooling and shading efficiencies, with gray nets showing the best light transmission and cooling effect. Shading significantly alleviated abnormal heat-induced grape softness. The total soluble solids (TSS) content and grape coloration were affected under gray, blue, and green shade nets. Nonetheless, TSS exceeded 18 °Brix under gray, blue, and green nets, as required of first-class high-quality fruit. The peel color was not significantly affected under gray or blue shade nets, whereas unshaded grapes showed clear heat-stress damage, especially on the edges of unshaded bottom leaves, in which the net photosynthesis rate was significantly lower than that under shading, indicating that high light intensity and heat caused premature leaf senescence. Colored shade nets reduced greenhouse temperature and light intensity, thereby alleviating the premature senescence of grape plants. Grape quality under black shade nets was poor, whereas superior quality was achieved using gray or blue shade nets.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9102565PMC
http://dx.doi.org/10.3390/plants11091227DOI Listing

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