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Triana and Schizocentron elegans Meissn under controlled photoperiods

Triana and Schizocentron elegans Meissn under controlled photoperiods

Hoehnea 30(2): 155-161, August

The aim of the present study was to analyse the establishment and initial growth of plants of two species of Melastomataceae occurring in the cerrado. Seedlings of Miconia albicans and Schizocentron elegans obtained from seeds were cultivated under controlled daylengths of 10 h, 14 h and 18 h. Growth measurements, such as plant length, leaf number and number of nodes, were taken at each ten days during ten months for M. albicans and at each five days during four months for S. elegans. Leaf area was measured at the end of the periods of observation. In M albicans, plants grew more in longer photoperiods, while in S. elegans, plant length was higher in 10 h photoperiod. Number of leaves, number of nodes and leaf area did not differ statistically in M albicans among the photoperiods tested. In S. elegans, higher leaf number occurrred in plants under 10 h and 18 h; number of nodes and leaf area were not affected by photoperiod. The results show that the low plant survival (33%) and slow initial growth limit the increase of new individuals of these two species in the cerrado.

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