Mesh Crop Cover Optimizes the Microenvironment in a Tropical Region and Modifies the Physiology and Metabolome in Tomato

In tropical regions, high light levels can lead to increased photooxidative damage in plants. Thus, reducing solar radiation could have a substantial impact on crop performance. This study aimed evaluate the physiological responses and metabolic profile of two tomato varieties grown microenvironments modified with cover meshes under level warm climate. The experiment was achieved irradiance an unfavorably temperature. “Moneymaker” (MM) “Campeche 40” (C40) were from 45 130 days after sowing at four levels: 100% (T1), 80% (T2), 75% (T3), 50% (T4). both varieties, plants lowest irradiances (T3 T4) tallest, larger leaf areas, accumulated more aerial root biomass. Under moderate shading took better advantage had highest photochemical quenching coefficient (qP) (C40 = 0.60 MM 0.48) electron transport rate (ETR). However, T3 T4 net assimilation (23.6 23.9 µmol m−2 s−1 C40, 22.7 22.6 MM, respectively) A/Ci coefficients. Although accumulate similar metabolites, leaves glucose C40 proline valine. Furthermore, glycine GABA radiation, valine than shade We conclude that using areas be alternative reduce abiotic stress factors