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Photosynthesis, growth, and survival in seedlings of four tropical fruit-tree species under intense radiation
Ortiz, Daniel; Moreno, Flavio; Diez, Maria Claudia.
  • Ortiz, Daniel; Corporación Colombiana de Investigación Agropecuaria ­ AGROSAVIA. Centro de Investigación Palmira. CO
  • Moreno, Flavio; Universidad Nacional de Colombia. CO
  • Diez, Maria Claudia; Universidad Nacional de Colombia. CO
Acta amaz ; 51(1): 1-9, jan.-mar. 2021.
Article in English | LILACS | ID: biblio-1352826
ABSTRACT
In the Amazon region, agroforestry systems (AFSs) are recommended as a sustainable production alternative for local communities. A common component in Amazonian AFSs are tropical fruit trees, which can form the canopy or grow in the understory. In this study, we evaluated the effect of high radiation on photosynthesis, growth and seedling survival of four Amazonian fruit-tree species Theobroma cacao, Eugenia stipitata, Inga edulis and Psidium guajava. Growth, chlorophyll fluorescence, gas exchange, and leaf pigments were measured in seedlings of each species grown for 12 months inside shade houses with low (8%), medium (30%) and high relative illumination (100%). Eugenia stipitata and T. cacao had the lowest acclimation capacity to high solar radiation, followed by I. edulis. Therefore, these species must be grown under intermediate light levels in early growth stages, to protect them from direct sunlight. In contrast, P. guajava seedlings demonstrated high tolerance to elevated radiation, therefore, this species can be planted under full sunlight. (AU)
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Full text: Available Index: LILACS (Americas) Main subject: Carotenoids / Chloroplasts / Photosystem II Protein Complex / Rainforest / Acclimatization Language: English Journal: Acta amaz Journal subject: Science Year: 2021 Type: Article Affiliation country: Colombia Institution/Affiliation country: Corporación Colombiana de Investigación Agropecuaria ­ AGROSAVIA/CO / Universidad Nacional de Colombia/CO

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Full text: Available Index: LILACS (Americas) Main subject: Carotenoids / Chloroplasts / Photosystem II Protein Complex / Rainforest / Acclimatization Language: English Journal: Acta amaz Journal subject: Science Year: 2021 Type: Article Affiliation country: Colombia Institution/Affiliation country: Corporación Colombiana de Investigación Agropecuaria ­ AGROSAVIA/CO / Universidad Nacional de Colombia/CO