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[学术文献 ] Plant immunity to insect herbivores: mechanisms, interactions, and innovations for sustainable pest management 进入全文
Frontiers in Plant Science 期刊
Plant–insect interactions pose a major threat to global food security and ecological stability. This review provides a comprehensive synthesis of the molecular and physiological mechanisms underlying plant immunity against herbivorous insects, with emphasis on structural defenses, secondary metabolites, and hormone signaling pathways including Jasmonic acid, salicylic acid, and ethylene. It highlights key advances in understanding defense signaling crosstalk, effector-triggered responses, and the role of microbiota and environmental cues. The review further discusses insect counterstrategies and explores cutting-edge technologies-CRISPR/Cas9, RNA interference, and metabolic engineering that are reshaping pest management. However, challenges remain, including limited field validation of engineered traits, ecological trade-offs, and regulatory hurdles. We conclude by outlining future research directions focused on multi-omics integration, climate-resilient defense networks, and ethical deployment of plant biotechnologies within sustainable agroecosystems.
[学术文献 ] Soil microbe-induced plant volatiles can alert neighboring plants to heavy metal stress 进入全文
Journal of Plant Ecology 期刊
While the alerting effects of microbe-induced plant volatiles (MIPVs) to biotic stressors have been extensively studied, the ecological functions of MIPVs responding to abiotic stressors have received less attention. Using an interplant communication assay setup, we employed Phytolacca americana as a study species to investigate whether heavy metal-induced MIPVs released by the emitter plants contribute to metal tolerance in neighboring receiver plants. We found that high levels of manganese (Mn) stress increased the total MIPV emissions of plants cultivated in non-sterilized soil, in contrast to volatile organic compounds emitted by plants in sterilized soil. MIPVs produced by the Mn-stressed plants notably altered the hormonal profiles of the receiver plants, leading to increased similarity in soil microbial assembles and modification of competitive, stress-tolerant, ruderal strategies. Consequently, the receiver plants exhibited enhanced tolerance to subsequent Mn stress, as evidenced by improved growth performance, increased antioxidant enzyme activities and reduced membrane damage. By unraveling the mechanism underlying MIPV-mediated tolerance priming for neighboring plants, we reveal a key signal role of soil microorganisms involved in plant–plant communication. This study represents one of the initial efforts to elucidate the alerting effects of MIPVs induced by heavy metal stress on neighboring plants and its ecological consequences.
[学术文献 ] Herbivory-induced green leaf volatiles increase plant performance through jasmonate-dependent plant-soil feedbacks 进入全文
Nature Plants 期刊
Plants influence each other chemically by releasing leaf volatiles and root exudates, but whether and how these two phenomena interact remains unknown. Here we demonstrate that volatiles that are released by herbivore-attacked leaves trigger plant–soil feedbacks, resulting in increased performance of different plant species. We show that this phenomenon is due to green leaf volatiles that induce jasmonate-dependent systemic defence signalling in receiver plants, which results in the accumulation of beneficial soil bacteria in the rhizosphere. These soil bacteria then increase plant growth and enhance plant defences. In maize, a cysteine-rich receptor-like protein kinase, ZmCRK25, is required for this effect. In four successive year-field experiments, we demonstrate that this phenomenon can suppress leaf herbivore abundance and enhance maize growth and yield. Thus, volatile-mediated plant–plant interactions trigger plant–soil feedbacks that shape plant performance across different plant species through broadly conserved defence signalling mechanisms and changes in soil microbiota. This phenomenon expands the repertoire of biologically relevant plant–plant interactions in space and time and holds promise for the sustainable intensification of agriculture.
[统计数据 ] Tea Import quantity from Five Continents in 2023 (FAOSTAT) 进入全文
FAO 网站
根据 FAOSTAT，最新统计了2023年度五大洲和世界茶叶进口量（t），以及相应数据标记说明，详细数据见表Tea Import quantity from Five Continents in 2023 (FAOSTAT)。
[会议论文 ] Development of a Gas Sensor for Green Leaf Volatile Detection 进入全文
IEEE 会议
This paper reports the development of a high-sensitivity gas sensor and the demonstration of selectively detecting green leaf volatiles (GLV, here hexanal) released from damaged plant leaves. The developed sensor is a conductivity sensor that utilized a 5.2-nm gap as the key detection site between electrodes. The gap was coated with with customized molecular probes toward binding to hexanal. The fabricated sensor demonstrated the detection of a GLV, hexanal, from the collected gas samples from damaged plant leaves, sorghum. Gas samples were collected into a tedlar bag from a glass jar containing damaged sorghum leaves. When exposed to hexanal concentrations from 77.7 to 5181.3 ppm, it produced output signal changes in resistance by 1.64~4.45 times. The sensor response time was measured as 41.6 min at a hexanal concentration of 77.7 ppm.
[学术文献 ] Herbivore-specific plant volatiles prime neighboring plants for nonspecific defense responses 进入全文
Plant Cell & Environment 期刊
Plants produce species-specific herbivore-induced plant volatiles (HIPVs) after damage. We tested the hypothesis that herbivore-specific HIPVs prime neighboring plants to induce defenses specific to the priming herbivore. Since Manduca sexta (specialist) and Heliothis virescens (generalist) herbivory induced unique HIPV profiles in Nicotiana benthamiana, we used these HIPVs to prime receiver plants for defense responses to simulated herbivory (mechanical wounding and herbivore regurgitant application). Jasmonic acid (JA) accumulations and emitted volatile profiles were monitored as representative defense responses since JA is the major plant hormone involved in wound and defense signaling and HIPVs have been implicated as signals in tritrophic interactions. Herbivore species-specific HIPVs primed neighboring plants, which produced 2 to 4 times more volatiles and JA after simulated herbivory when compared to similarly treated constitutive volatile-exposed plants. However, HIPV-exposed plants accumulated similar amounts of volatiles and JA independent of the combination of priming or challenging herbivore. Furthermore, volatile profiles emitted by primed plants depended only on the challenging herbivore species but not on the species-specific HIPV profile of damaged emitter plants. This suggests that feeding by either herbivore species primed neighboring plants for increased HIPV emissions specific to the subsequently attacking herbivore and is probably controlled by JA.
