培養器外直接発根法においてCO₂施用および高日射量がバレイショ小植物体の生長に及ぼす効果

抄録

The effect of CO₂ enrichment and high solar radiation on the growth of potato (Solarium tuberosum L. cv. Benimaru) plantlets in the direct ex-vitro rooting method was examined. Explants of micropropagated shoots, single node cuttings each with a leaf, were inserted directry into the rockwool plugs and cultured inside the environmental control units at different intensities of solar radiation under CO₂ non-enriched and CO₂ enriched conditions.
On the 35th day, the fresh and dry weights and the number of leaves of the plantlets under high solar radiation and CO₂ enriched conditions were, respectively, 2.4, 3.1 and 1.7 times greater than those under low solar radiation and CO₂ non-enriched conditions. High solar radiation and CO₂ enrichment promoted the growth and rooting of the plantlets in the direct ex-vitro rooting method.
The fresh and dry weights of the plantlets under high solar radiation and CO₂ enriched conditions in the direct ex-vitro rooting method were greater than those in the conventional method.