COMPETITION BETWEEN PLANTS OF DIFFERENT SUCCESSIONAL STAGES - MYCORRHIZAE AS REGULATORS
COMPETITION BETWEEN PLANTS OF DIFFERENT SUCCESSIONAL STAGES - MYCORRHIZAE AS REGULATORS
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DOI：
10.1139/b84-356
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发表时间：
1984-01-01
期刊：
影响因子：
--
通讯作者：
ALLEN, MF
中科院分区：
文献类型：
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作者：
ALLEN, EB;ALLEN, MF
猪毛菜，一个殖民的一年，不形成泡状丛枝菌根（nonmycotrophic），生长在纯培养和混合物中与两个mycotrophic草是后期演替的优势，斯氏冰草和Bouteloua gracilis。土壤要么保持无菌，要么接种菌根真菌。在纯培养中，真菌引起两种草的干重没有显著增加，但在与S. kali，菌根感染与草量增加显著相关。菌根感染与纯培养和混合培养中气孔导度的增加有关。S. Kali有较低的气孔导度，但没有显着减少与菌根真菌的质量。菌根真菌菌丝在根际，偶尔在皮层，但没有泡囊或丛枝，观察到。卡利。在非菌根物种和后来的演替菌根物种之间的竞争是一种驱动演替的机制，接种密度可以决定演替的速度。
Salsola kali, a colonizing annual which does not form vesicular-arbuscular mycorrhizae (nonmycotrophic), was grown in pure culture and in mixtures with two mycotrophic grasses which are late successional dominants, Agropyron smithii and Bouteloua gracilis. Soils were either left sterile or inoculated with mycorrhizal fungi. In pure culture mycorrhizae caused no significant increase in dry mass of either grass, but in mixed culture with S. kali, mycorrhizal infection was sigificantly related to increased mass of grasses. Mycorrhizal infection was related to increased stomatal conductance of the grasses in both pure and mixed culture. S. kali had lower stomatal conductance but not a significantly reduced mass with mycorrhizal fungi. Hyphae of mycorrhizal fungi, but not vesicles or arbuscules, were observed in the rhizosphere and occasionally the cortex of S. kali. Where competition between colonizing nonmycorrhizal species and later successional mycorrhizal species is a mechanism which drives succession, the inoculum density may determine the rate of succession.