Dear Editor,Phospholipids play key biological roles in processes such as photosynthesis,signal transduction,vesicle transport,cytoskeletal remodeling,and developmental processes(Colin and Jaillais,2020).Beyond their b...Dear Editor,Phospholipids play key biological roles in processes such as photosynthesis,signal transduction,vesicle transport,cytoskeletal remodeling,and developmental processes(Colin and Jaillais,2020).Beyond their biological significance in plants,phospholipids have beneficial effects on a range of human diseases and cognitive processes(Wang and Tontonoz,2019).Rice(Oryza sativa L.)provides essential nutrition and energy for over half of the global population(Li et al.,2022).Although lipids constitute a relatively small proportion of rice grains compared with starch and proteins,they are a dietary source of lipids for impoverished regions in Asia and Africa,where dietary diversity is limited.展开更多
Ethylene is a stress hormone with contrasting whether these differences are plant- or herbivore-specific. effects on herbivore resistance. However, it remains unknown We cloned a rice 1-aminocyclopropane-l-carboxylic ...Ethylene is a stress hormone with contrasting whether these differences are plant- or herbivore-specific. effects on herbivore resistance. However, it remains unknown We cloned a rice 1-aminocyclopropane-l-carboxylic acid （ACC） synthase gene, OsACS2, whose transcripts were rapidly up-regulated in response to mechanical wounding and infestation by two important pests： the striped stem borer （SSB） Chilo suppressalis and the brown planthopper （BPH） Nilaparvata lugens. Antisense expression of OsACS2 （as-acs） reduced elicited ethylene emission, SSB-elicited trypsin protease inhibitor （TrypPI） activity, SSB-induced volatile release, and SSB resistance. Exogenous application of ACC restored TrypPI activity and SSB resistance. In contrast to SSB, BPH infestation increased volatile emission in as-acs lines. Accordingly, BPH preferred to feed and oviposit on wild-type （WT） plants--an effect that could be attributed to two repellent volatiles, 2-hep- tanone and 2-heptanol, that were emitted in higher amounts by as-acs plants. BPH honeydew excretion was reduced and natural enemy attraction was enhanced in as-acs lines, resulting in higher overall resistance to BPH. These results demonstrate that ethylene signaling has contrasting, herbivore-specific effects on rice defense responses and resistance against a chewing and a piercing-sucking insect, and may mediate resistance trade-offs between herbivores of different feeding guilds in rice.展开更多
基金supported by the National Natural Science Foundation of China(32360069,31960063,and 32300452)the 111 Project(D20024)the Hainan University Startup Fund(KYQD(ZR)1866).
文摘Dear Editor,Phospholipids play key biological roles in processes such as photosynthesis,signal transduction,vesicle transport,cytoskeletal remodeling,and developmental processes(Colin and Jaillais,2020).Beyond their biological significance in plants,phospholipids have beneficial effects on a range of human diseases and cognitive processes(Wang and Tontonoz,2019).Rice(Oryza sativa L.)provides essential nutrition and energy for over half of the global population(Li et al.,2022).Although lipids constitute a relatively small proportion of rice grains compared with starch and proteins,they are a dietary source of lipids for impoverished regions in Asia and Africa,where dietary diversity is limited.
基金The study was jointly sponsored by the National Basic Research Program of China （2010CB126200）, the Innovation Research Team Program of the National Natural Science Foundation of China （31321063）, the National Program of Transgenic Variety Development of China （2011ZX08001- 001）, and the China Agriculture Research System （CARS-01-21）.
文摘Ethylene is a stress hormone with contrasting whether these differences are plant- or herbivore-specific. effects on herbivore resistance. However, it remains unknown We cloned a rice 1-aminocyclopropane-l-carboxylic acid （ACC） synthase gene, OsACS2, whose transcripts were rapidly up-regulated in response to mechanical wounding and infestation by two important pests： the striped stem borer （SSB） Chilo suppressalis and the brown planthopper （BPH） Nilaparvata lugens. Antisense expression of OsACS2 （as-acs） reduced elicited ethylene emission, SSB-elicited trypsin protease inhibitor （TrypPI） activity, SSB-induced volatile release, and SSB resistance. Exogenous application of ACC restored TrypPI activity and SSB resistance. In contrast to SSB, BPH infestation increased volatile emission in as-acs lines. Accordingly, BPH preferred to feed and oviposit on wild-type （WT） plants--an effect that could be attributed to two repellent volatiles, 2-hep- tanone and 2-heptanol, that were emitted in higher amounts by as-acs plants. BPH honeydew excretion was reduced and natural enemy attraction was enhanced in as-acs lines, resulting in higher overall resistance to BPH. These results demonstrate that ethylene signaling has contrasting, herbivore-specific effects on rice defense responses and resistance against a chewing and a piercing-sucking insect, and may mediate resistance trade-offs between herbivores of different feeding guilds in rice.
