Morphophysiological adjustments to shade of jaboticaba tree saplings

• Published in: Revista Ceres Vol. 69; no. 4; pp. 400 - 407
• Main Authors: Moura, Amanda Pacheco Cardoso, Gil, Bruna Valéria, Perboni, Anelise Tessari, Oliveira, Fabrícia Lorrane Rodrigues, Sant’Anna-Santos, Bruno Francisco, Danner, Moeses Andrigo
• Format: Journal Article
• Language: English; Portuguese
• Published: Universidade Federal de Viçosa 01.08.2022; Universidade Federal De Viçosa
• Subjects: acclimatization; AGRICULTURE, MULTIDISCIPLINARY; leaf anatomy; light gradient; photosynthesis; Plinia peruviana; Plinia peruviana; leaf anatomy; acclimatization; photosynthesis; light gradient
• ISSN: 0034-737X; 2177-3491; 2177-3491
• DOI: 10.1590/0034-737x202269040003

ABSTRACT We aimed to verify the morphophysiological changes in jaboticaba tree (Plinia peruviana (Poir.) Govaerts) saplings under shade gradient to improve knowledge on the appropriate light environmental conditions for the saplings production and field homogeneous or intercropping cultivation of this species. The saplings were grown under full sun and artificial shade levels (30%, 50%, and 80%). Growth, photosynthetic pigments, gas exchanges, chlorophyll fluorescence, and leaf anatomy characters were evaluated. Our results showed that jaboticaba tree saplings growth was improved under full sun and 30% of shade. Under 50% and 80% shade the saplings demonstrate phenotypic plasticity, such as larger and thinner leaves. Chlorophyll fluorescence, chlorophyll content, and quantum yield of photosystem II were higher under higher shade level, but the CO2 assimilation rate was not different between light conditions. These changes are typically found in shade-tolerant plants and is related to perform photosynthesis more efficiently in highly variable light conditions. Despite that, we recommend that cultivation be carried out under full sun or up to 30% shade to maximize jaboticaba tree saplings growth in nurseries and orchards.