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- W3214565553 abstract "Abstract Background: Kiwifruit is a common and popular fruit around the world. However, white peach scale ( Pseudaulacaspis pentagona) [Targioni-Tozzetti], a scale insect with a wide range of hosts, seriously affects the yield and quality of kiwifruit. To investigate the differences in resistance of different kiwifruit cultivars to Pseudaulacaspis pentagona, cellular structure and gene expression assays were used to explain the mechanism. Results: In this study, based on the stability of the rate of injury fruit, we selected four cultivars from fifty kiwifruits for in-depth study, including “LC-04285”, “CF-3”, “DA-7B” and “Hayward”. By analyzing the differences in the anatomical structure of the canes of these cultivars, we found that the resistant cultivar LC-04285 had thicker cuticle, denser epidermis and cortex. The real-time quantitative PCR data indicated that the expression levels of genes related to cuticle synthesis and formation of epidermis and cortex are also higher in “LC-04285”. Jasmonic acid (JA) is an important hormone involved in plant defense against many insect pests. In this study, we found that the expression levels of JA receptor COI1 were higher in “LC-04285”. However, the expression levels of AcJAZs , which played negative role in JA signaling, were higher in susceptible cultivar “Hayward”. Besides, the expression levels of AcICS , AcPAL4 , AcPAL5 , and AcNPRs , which were involved in salicylic acid (SA) synthesis and SA response, were also higher in “LC-04285”. Conclusions: Our results revealed the mechanism of kiwifruit resistance to P. pentagona at the molecular and cellular levels. This study provided useful guidance for breeding insect-resistant kiwifruit in future." @default.
- W3214565553 created "2021-11-22" @default.
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- W3214565553 date "2021-11-10" @default.
- W3214565553 modified "2023-09-27" @default.
- W3214565553 title "Comparative Study on Pseudaulacaspis Pentagona Resistance of Four Different Cultivars of Kiwifruit" @default.
- W3214565553 doi "https://doi.org/10.21203/rs.3.rs-1038917/v1" @default.
- W3214565553 hasPublicationYear "2021" @default.
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