A new currency for mutualism? Fungal endophytes alter antioxidant activity in hosts responding to drought
A new currency for mutualism? Fungal endophytes alter antioxidant activity in hosts responding to drought
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DOI：
10.1007/s13225-012-0156-y
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发表时间：
2012-05-01
期刊：
影响因子：
20.3
通讯作者：
Bauerle, Taryn L.
中科院分区：
文献类型：
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作者：
Hamilton, Cyd E.;Bauerle, Taryn L.
真菌内生菌对寄主的生产性能有显著影响，包括但不限于生殖产量的变化，以及生物和非生物胁迫耐受性的变化。抗草食的最终机制已在许多真菌-植物共生体中得到证实，并涉及真菌产生生物碱。生物碱因此被定义为一种货币，负责增加宿主对草食的抵抗力。我们为另一种货币可能负责增加宿主对由内生菌定殖引起的非生物胁迫的耐受性的假设提供支持；即抗氧化剂。我们报道了由非生物胁迫引起的内生菌定殖宿主的抗氧化剂活性相对较高，并提出抗氧化剂是真菌内生菌与其宿主之间相互作用的另一种货币。我们认识到真菌内生菌的相互作用是多样而复杂的，包括拮抗、共生和互惠。
Fungal endophytes have significant effects on host performance including but not limited to changes in reproductive output, as well as, biotic and abiotic stress tolerance. The ultimate mechanisms for resistance to herbivory have been documented in a number of fungal-plant symbiota and involve the production of alkaloids by the fungus. Alkaloids have thus been defined as a currency responsible for increased host resistance to herbivory. We provide support for the hypothesis that another currency may be responsible for increased host tolerance to abiotic stress resulting from endophyte colonization; namely antioxidants. We report comparatively higher activity of antioxidants in endophyte colonized hosts resulting from abiotic stress and propose antioxidants are another currency via which mutualistic interactions between fungal endophytes and their hosts can occur. We recognize fungal endophyte interactions are diverse and complex and include antagonisms, commensalisms, and mutualisms.