Growth and photosynthetic responses during ex vitro acclimatization of Etlingera elatior (Jack) rm smith (torch ginger)

Marcelo   Rodrigues; Patrícia   Duarte de Oliveira Paiva; Rodrigo   Therezan de Freitas; Thaís   de Oliveira Fontes Mansur; Renato   Paiva; João Paulo   Rodrigues Alves Delfino Barbosa

Growth and photosynthetic responses during ex vitro acclimatization of Etlingera elatior (Jack) rm smith (torch ginger)

Autores

Marcelo Rodrigues

Patrícia Duarte de Oliveira Paiva

Rodrigo Therezan de Freitas

Thaís de Oliveira Fontes Mansur

Renato Paiva

João Paulo Rodrigues Alves Delfino Barbosa

Editor

Universidade Estadual de Maringá

Descripción

Torch ginger ( Etlingera elatior (Jack) RM Smith) can be propagated in vitro , but there is currently little information about the stages of accl imatization and adaptation for torch ginger in a greenhouse. The objective was to study the growth resp onses, survival and photos ynthetic response during the acclimatization of plants maintained on three different substrates (Plantmax forestry ® , sand and 1:1 Plantmax forestry ® and sand) under three shading conditions ( 50% red and blue shading nets and control without shading nets). The highest le af and shoot numbers per plant and survival rate we re observed in treatments with the Plantmax forestry ® type substrate in the absence of shading. In vitro culture plants behaved similarly or better than rhiz ome propagated control plants with regard to the net photosynthesis rate, carboxylation efficiency, stomatal conductance and transpiration rate. In general, for both conditions, in vitro and control plants had similar efficiency of bi ochemical functions and of photosystem II. These results show that plants derived from in vitro culture exhibit satisfactory physiological yield and greenhouse acclimation capacity.