Control of Fungal Diseases and Increase in Yields of a Cultivated Jujube Fruit (Zizyphus jujuba Miller var. inermis Rehder) Orchard by Employing Lysobacter antibioticus HS124

The objective of this study is to investigate the inhibitory effects of Lysobacter antibioticus HS124 on fungal phytopathogens causing gray mold rot, stem rot, and anthracnose. Another objective of this study is to promote the yield of fruit in jujube farms. L. antibioticus HS124 produces chitinase,...

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Bibliographic Details
Published in:Forests 2019-12, Vol.10 (12), p.1146
Main Authors: Kwon, Jun-Hyeok, Won, Sang-Jae, Moon, Jae-Hyun, Kim, Chul-Woo, Ahn, Young-Sang
Format: Article
Language:English
Subjects:
Anthracnose
Chitinase
Crop yield
Cultivation
Enzymes
Farms
Fruit cultivation
Fruits
Fungal diseases
Fungi
Fungicides
Grey mold
Inoculation
Lysobacter
Microorganisms
Minerals
Mycelia
Nutrient concentrations
Nutrient uptake
Pathogens
Pesticides
Plant diseases
Plant hormones
Root development
Stem rot
Wilting
Ziziphus jujuba
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Summary:The objective of this study is to investigate the inhibitory effects of Lysobacter antibioticus HS124 on fungal phytopathogens causing gray mold rot, stem rot, and anthracnose. Another objective of this study is to promote the yield of fruit in jujube farms. L. antibioticus HS124 produces chitinase, a lytic enzyme with the potential to reduce mycelial growth of fungal phytopathogens involving hyphal alterations with swelling and bulbous structures, by 20.6 to 27.3%. Inoculation with L. antibioticus HS124 decreased the appearance of fungal diseases in jujube farms and increased the fruit yield by decreasing fruit wilting and dropping. In addition, L. antibioticus HS124 produced the phytohormone auxin to promote vegetative growth, thereby increasing the fruit size. The yield of jujube fruits after L. antibioticus HS124 inoculation was increased by 6284.67 g/branch, which was 2.9-fold higher than that of the control. Auxin also stimulated fine root development and nutrient uptake in jujube trees. The concentrations of minerals, such as K, Ca, Mg, and P in jujube fruits after L. antibioticus HS124 inoculation were significantly increased (1.4- to 2.0-fold greater than the concentrations in the control). These results revealed that L. antibioticus HS124 could not only control fungal diseases but also promote fruit yield in jujube farms.
ISSN:1999-4907
1999-4907
DOI:10.3390/f10121146