Analysis of tea plant resistance to tea green leafhopper, Empoasca onukii , by detecting stylet-probing behavior with DC electropenetrography

2017 ◽  
Vol 165 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Hiroshi Yorozuya
Keyword(s):  
Plant Resistance ◽  
Tea Plant ◽  
Green Leafhopper ◽  
Probing Behavior

scholarly journals Egg parasitoids of the tea green leafhopper Empoasca onukii (Hemiptera, Cicadellidae) in Japan, with description of a new species of Anagrus (Hymenoptera, Mymaridae)

ZooKeys ◽  
2019 ◽  
Vol 836 ◽  
pp. 93-112 ◽  
Author(s):  
Serguei V. Triapitsyn ◽  
Tetsuya Adachi-Hagimori ◽  
Paul F. Rugman-Jones ◽  
Adema Barry ◽  
Aoba Abe ◽  
...  
Keyword(s):  
Sequence Data ◽  
Egg Parasitoid ◽  
Egg Parasitoids ◽  
Tea Plant ◽  
Nuclear Ribosomal Dna ◽  
Morphological Evidence ◽  
Japanese Species ◽  
New Host ◽  
Green Leafhopper ◽  
Xinjiang Uyghur Autonomous Region

Fairyfly (Hymenoptera, Mymaridae) egg parasitoids of the tea green leafhopper Empoasca (Matsumurasca) onukii Matsuda (Hemiptera, Cicadellidae), an economically important pest in Asia of the tea plant, Camelliasinensis, were identified from specimens reared in Japan. Using a combination of genetic and morphological evidence, Anagrus (Anagrus) rugmanjonesi Triapitsyn & Adachi-Hagimori, sp. n., is described and illustrated. It is shown to be different from the most similar A.turpanicus Triapitsyn & Hu, an egg parasitoid of a leafhopper pest of cultivated grapes which is known from Xinjiang Uyghur Autonomous Region in China. Mitochondrial and nuclear ribosomal DNA sequence data provide clear evidence for the separation of A.rugmanjonesi from A.turpanicus and other members of the Anagrusincarnatus Haliday species complex. A key to females of the Japanese species of Anagrus Haliday is given. Two other species of Mymaridae, Aresconenocki (Subba Rao & Kaur) and Stethyniumempoascae Subba Rao, are also identified, albeit the latter one only tentatively. Both latter taxa are newly recorded from Japan, and E.onukii represents their new host association.

scholarly journals JA-Ile-Macrolactone 5b Induces Tea Plant (Camellia sinensis) Resistance to Both Herbivore Ectropis obliqua and Pathogen Colletotrichum camelliae

2020 ◽  
Vol 21 (5) ◽  
pp. 1828 ◽  
Author(s):  
Songbo Lin ◽  
Yanan Dong ◽  
Xiwang Li ◽  
Yuxian Xing ◽  
Miaomiao Liu ◽  
...  
Keyword(s):  
Growth Rate ◽  
Plant Resistance ◽  
Defense Responses ◽  
Tea Plant ◽  
Ethyl Chloroformate ◽  
Isobutyl Chloroformate ◽  
Harmful Organisms ◽  
Underlying Mechanisms ◽  
Tea Plants

Jasmonates (JAs), the group of lipid-derived hormones, were found to control the defense responses in a myriad of plants. Meaningfully, the macrolactones of 12-hydroxy jasmonate isoleucine (12OH-JA-Ile) were reported to induce the defensive response of wild tobacco. However, little to nothing has been known about the elicitation effect of JA-Ile-macrolactones on woody plants to harmful organisms, let alone its underlying mechanisms. Here, we first optimized the synthetic routine using mild toxic reagent isobutyl chloroformate instead of ethyl chloroformate for conjugation, and we used acetonitrile (MeCN) instead of ethyl alcohol for the better dissolution of p-toluenesulfonic acid (p-TsOH) to gain JA-Ile-macrolactones. JA-Ile-macrolactone 5b-treated tea plants significantly inhibited the larvae weight gain of Ectropis obliqua larvae and the lesions caused by Colletotrichum camelliae. Furthermore, the expression level of CsOPR3 was significantly upregulated in 5b-treated leaves. Meanwhile, 5b reduced the accumulation of eriodictyol 7-O-glucuronide (EDG) in tea plants, which was confirmed to promote the growth rate of E. obliqua larvae by artificial diet assay. In conclusion, our study proved that the exogenous application of 5b could induce the tea plant resistance both to herbivore E. obliqua and pathogen C. camelliae, and EDG was identified as one of the secondary metabolites that could influence the growth rate of E. obliqua, but it did not directly influence the infection of C. camelliae in vitro. Further research should be carried out to clarify the mechanism through which 5b induces tea plant resistance to C. camelliae.

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