Articles
LOOFAH FIBER AND SPHAGNUM MOSS IN THE ACCLIMATIZATION OF CATTLEYA GUTTATA AND ZYGOPETALUM MACKAYI INOCULATED WITH PLANT GROWTH-PROMOTING BACTERIA
Article number
1076_12
Pages
113 – 118
Language
English
Abstract
Brazilian orchids are highly appraised in ornamental horticulture therefore the interest in technologies that might contribute to their growth management in nurseries, as well as help to avoid the loss of some endangered species.
Substrates and inoculation with plant growth-promoting bacteria (PGPB) are envisaged as topics of interest that might lead to better water and nutrient absorption, and thus to best plant growth.
Studies about the effect of both PGPB and substrates on orchids are still inexistent.
This research aimed to evaluate the effect of PGPB inoculation on the acclimatization of Cattleya guttata and Zygpopetalum mackayi in different substrates.
Plantlets of the two orchid species were grown in three different substrates (S1- sphagnum moss, S2- loofah fiber, S3- sphagnum moss + loofah fiber) with (B+) or without (B-) inoculation of PGPB (Bacteria mix: strain HRC54 Herbaspirillum seropedicae + strain 103 Burkholderia sp. + strain 22 Rosa at 108 cell ml-1), in an experiment in randomized blocks with three replications, and ten plantlets per plot.
Plantlets were immersed in inoculum for 15 minutes before the planting.
Highest survival of Zygopetalum mackayi (74%) was observed when S3 and B- were combined, but the highest survival of inoculated plantlets (B+) were observed in S2 (50%) and S3 (58%), whose values did not differ statistically.
Survival of Cattleya guttata was highest in S2 (56%) as compared to S1 (35%), but S1 results did not differ from those in S3 (50%). Growth of plantlets was also evaluated.
Results indicate that loofah fiber might be used in mixture with sphagnum moss for the acclimatization of certain orchid species.
Substrates and inoculation with plant growth-promoting bacteria (PGPB) are envisaged as topics of interest that might lead to better water and nutrient absorption, and thus to best plant growth.
Studies about the effect of both PGPB and substrates on orchids are still inexistent.
This research aimed to evaluate the effect of PGPB inoculation on the acclimatization of Cattleya guttata and Zygpopetalum mackayi in different substrates.
Plantlets of the two orchid species were grown in three different substrates (S1- sphagnum moss, S2- loofah fiber, S3- sphagnum moss + loofah fiber) with (B+) or without (B-) inoculation of PGPB (Bacteria mix: strain HRC54 Herbaspirillum seropedicae + strain 103 Burkholderia sp. + strain 22 Rosa at 108 cell ml-1), in an experiment in randomized blocks with three replications, and ten plantlets per plot.
Plantlets were immersed in inoculum for 15 minutes before the planting.
Highest survival of Zygopetalum mackayi (74%) was observed when S3 and B- were combined, but the highest survival of inoculated plantlets (B+) were observed in S2 (50%) and S3 (58%), whose values did not differ statistically.
Survival of Cattleya guttata was highest in S2 (56%) as compared to S1 (35%), but S1 results did not differ from those in S3 (50%). Growth of plantlets was also evaluated.
Results indicate that loofah fiber might be used in mixture with sphagnum moss for the acclimatization of certain orchid species.
Authors
N.E. Manhães, J.M. Jasmim, L.A.A. Silva, B.B. Castro, N.L. Motta, V.R. Pereira, A.P.R.C. Erthal
Keywords
Orchidaceae, diazotrophic bacteria, Herbaspirillum, Burkholderia, substrate
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