CRESCIMENTO E TEORES DE PIGMENTOS FOLIARES EM FEIJÃO-CAUPI CULTIVADO SOB DOIS AMBIENTES DE LUMINOSIDADE
2011
ELONHA RODRIGUES DOS SANTOS | PAULO ROGÉRIO SIRIANO BORGES | SUSANA CRISTINE SIEBENEICHLER | ANTONIA PINTO DE CERQUEIRA | PAULO ROBERTO PEREIRA
paper aimed to evaluate the growth and accumulation of pigments in leaves of cowpea plants kept under two light conditions. The experimental design was carried out by using two randomized blocks with two treatments and twenty-two repetitions. The tested treatments were: natural environment (full sun) and artificial environment (50% light). The evaluated variety of cowpea (Vigna unguiculata (L.) Walp.) was the Vinegar, which has indeterminate growth habit. For growth analysis samples were taken at 10, 20, 30 and 40 days after emergence (DAE) and 50 DAE for determining the levels of a, b, and total chlorophyll and carotenoids content. Significant interaction was observed for the characteristics of the main stem length, leaf area, fresh weight and a, b, and total chlorophyll and carotenoids from plants grown in artificial environment. The studied type showed plasticity when subjected to low light, such as morphological changes in the length of main stem and leaf area, as well as changes in the amount of leaf pigments.
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