Local carbon reserves are insufficient for phloem terpene induction during drought in Pinus edulis in response to bark beetle-associated fungi

IF 8.3 1区生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-08-16 DOI:10.1111/nph.20051

R. Alex Thompson, Shealyn C. Malone, Drew Peltier, Diana Six, Nathan Robertson, Celso Oliveira Jr., Cameron D. McIntire, William T. Pockman, Nate G. McDowell, Amy M. Trowbridge, Henry D. Adams

引用次数: 0

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在干旱期间，局部碳储备不足以使欧洲赤松对树皮甲虫相关真菌产生韧皮部萜烯诱导作用。

干旱期间气孔关闭会抑制碳吸收，并可能降低树木的防御能力。干旱期间有限的碳供应可能会增加树木的死亡风险，特别是如果干旱限制了树木在生物袭击期间快速产生防御能力的话。我们利用碳储备和化学防御能力的生理数据对针叶树防御的新模型进行了参数化，该模型是在实验性干旱条件下对成熟的埃杜松（Pinus edulis）进行模拟树皮甲虫攻击前后建立的。在模拟攻击过程中，接种了该树的主要树皮甲虫 Ips confusus 的一致蓝斑真菌（Ophiostoma sp.），以诱导防御反应。碳储量越多的树木产生的防御能力越强，但测量的韧皮部碳储量仅占诱导防御反应的 23% 左右。我们的模型预测，如果仅靠局部储备来支持防御能力的产生，则树木会普遍死亡，这表明储存的树脂或碳储备被大量重新动员和运输到接种地点。我们的研究结果表明，在真菌接种后，从头合成萜烯只占所测得的蜾蠃韧皮部萜烯总量的一小部分。如果不将韧皮部萜烯浓度直接归因于可用碳，许多研究可能会高估树木诱导防御反应中从头合成萜烯的规模和重要性。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

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728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.