How does UV-B radiation affect the initial growth of common bean (Phaseolus vulgaris L.)? Physiological and structural aspects / Como a radiação UV-B afeta o crescimento inicial do feijoeiro-comum (Phaseolus vulgaris L.)? Aspectos fisiológicos e estruturais

• Autor(a) principal: Wanzeler, Ranna Batista
• Data de Publicação: 2019
• Outros Autores: Zanetti, Leonardo Valandro, Fantinato, Dayana Effgen, Gama, Vinicius Novo, Arrivabene, Hiulana Pereira, de Almeida Leite, Idalina Tereza, Dias Milanez, Camilla Rozindo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/4896
• topic: Agriculture; Anatomy; Beans; Pigments.

Increased UV-B radiation, a topic of concern due to climate change, can affect plant development through structural and physiological changes. Common bean (Phaseolus vulgaris L.) is a legume of great economic relevance, being one of the basic components of the human population's diet. Seeds of P. vulgaris var. Carioca were sown and grown in a growth chamber, and at 12 days of age were exposed for 15 min daily to UV-B radiation for a period of 14 days. Growth, leaf anatomy, gas exchange and pigments were evaluated. It was observed that UV-B radiation negatively affected the initial growth of bean plants, which had a reduction in height, number of leaves, fresh and dry leaf masses, leaf area, as well as reduction of stem and root dry masses. There was a reduction in the epidermis thickness, increase in the thickness of the palisade parenchyma and the leaf blade. It was verified yet reduction of the photosynthetic and photoprotectors pigments, reduction of the photosynthetic rate and alterations on the absorbent compounds of the UV-B radiation. The results obtained showed that the increase in UV-B radiation was harmful to the initial development of this crop.