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Lee YS, Kim YC. Tobacco Growth Promotion by the Entomopathogenic Fungus, Isaria javanica pf185. MYCOBIOLOGY 2019; 47:126-133. [PMID: 31001453 PMCID: PMC6452915 DOI: 10.1080/12298093.2018.1562692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/12/2018] [Accepted: 12/15/2018] [Indexed: 06/09/2023]
Abstract
Isaria javanica pf185 is an important entomopathogenic fungus with potential for use as an agricultural biocontrol agent. However, the effect of I. javanica pf185 on plant growth is unknown. Enhanced tobacco growth was observed when tobacco roots were exposed to spores, cultures, and fungal cell-free culture supernatants of this fungus. Tobacco seedlings were also exposed to the volatiles of I. javanica pf185 in vitro using I-plates in which the plant and fungus were growing in separate compartments connected only by air space. The length and weight of seedlings, content of leaf chlorophyll, and number of root branches were significantly increased by the fungal volatiles. Heptane, 3-hexanone, 2,4-dimethylhexane, and 2-nonanone were detected, by solid-phase micro-extraction and gas chromatography-mass spectrophotometry, as the key volatile compounds produced by I. javanica pf185. These findings illustrate that I. javanica pf185 can be used to promote plant growth, and also as a biocontrol agent of insect and plant diseases. Further studies are necessary to elucidate the mechanisms by which I. javanica pf185 promotes plant growth.
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Affiliation(s)
- Yong-Seong Lee
- Department of Applied Biology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Young Cheol Kim
- Department of Applied Biology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
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Yang S, Zhang XF, Gao YL, Chen D, She DM, Zhang T, Ning J. Male-Produced Aggregation Pheromone of Coffee Bean Weevil, Araecerus fasciculatus. J Chem Ecol 2017; 43:978-985. [PMID: 29043534 DOI: 10.1007/s10886-017-0894-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/10/2017] [Accepted: 10/02/2017] [Indexed: 11/30/2022]
Abstract
The coffee bean weevil (CBW), Araecerus fasciculatus (De Geer, 1775), is a cosmopolitan stored-product pest, especially in tropical and subtropical areas. Previous reports showed evidence for aggregation behavior of CBW and this study aimed to identify and evaluate the aggregation pheromone of this pest. Whole-body solvent extractions were analyzed by coupled gas chromatography-mass spectrometry and comparison of male and female extracts showed a male-specific compound which was identified as squalene, 2,6,10,15,19,23-hexamethyl-2,6,10,14,18,22-tetracosahexaene. This compound was shown to attract male and female CBW in Y-tube olfactometer and storage trap assays. The longevity of septum lures was also evaluated in a warehouse. Squalene could be useful in monitoring and controlling this pest.
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Key Words
- 2,6,10,15,19,23-hexamethyl-2,6,10,14,18,22-tetracosahexaene
- Olfaction
- Squalene
- Warehouse trapping
- Y-tube bioassay
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Affiliation(s)
- Shuai Yang
- Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture, Institute of Plant Protection, Baoding, 071000, China.,State Key Laboratory for Biology of Plant Diseases and Insect Pests, Chinese Academy of Agricultural Sciences, Institute of Plant Protection, Beijing, 100193, China
| | - Xiao-Fang Zhang
- Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture, Institute of Plant Protection, Baoding, 071000, China
| | - Yu-Lin Gao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Chinese Academy of Agricultural Sciences, Institute of Plant Protection, Beijing, 100193, China
| | - Dan Chen
- Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture, Institute of Plant Protection, Baoding, 071000, China
| | - Dong-Mei She
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Chinese Academy of Agricultural Sciences, Institute of Plant Protection, Beijing, 100193, China
| | - Tao Zhang
- Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture, Institute of Plant Protection, Baoding, 071000, China.
| | - Jun Ning
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Chinese Academy of Agricultural Sciences, Institute of Plant Protection, Beijing, 100193, China.
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