COMPORTAMENTO DE CAFEEIROS PROPAGADOS VIA EMBRIOGÃNESE SOMÃTICA / Performance Of Somatic Embryogenesis Propagated Coffee Plants

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Vegetative propagation of coffee by somatic embryogenesis (SE) is an important tool in genetic breeding programs, as allows the multiplication of hybrids and segregating genotypes and the reduction of the time required to the release of new cultivars. However, very few is known about the performance of SE derived plants in soils with low water availability. This work was conducted to evaluate the effect of different levels of soil water availability in coffee plants propagated by SE as compared with plants propagated by seeds. An experiment was carried out under green house conditions, using a 4x2 factorial treatment design, with four soil water levels (40%, 70%, 100% e 130% of the field capacity), and two propagation methods (SE and seeds), using six months old plants of the Catuaà Vermelho IAC 44 cultivar. The following parameters were evaluated: leaves, stems and roots dry weight, foliar area, height, stem diameter, root length, number of plagiotropic branches and number of nodes in the orthotropic branch. It was found that SE propagated plants and seed derived plants show similar development under conditions of low water availability, and that the root system of coffee plants propagated by SE is not a limiting factor, and can even contribute to the growth of the plants during the first months after planting.

ASSUNTO(S)

somatica embryogenesis fitotecnia embriogenese somÃtica micropropagation coffea cafÃ,micropropagaÃÃo

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