TRANSLOCATION OF SOIL-DERIVED PHOSPHORUS IN MYCELIAL CORD SYSTEMS IN RELATION TO INOCULUM RESOURCE SIZE
TRANSLOCATION OF SOIL-DERIVED PHOSPHORUS IN MYCELIAL CORD SYSTEMS IN RELATION TO INOCULUM RESOURCE SIZE
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DOI：
10.1111/j.1574-6941.1995.tb00128.x
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发表时间：
1995-05-01
影响因子：
4.2
通讯作者：
BODDY, L
中科院分区：
文献类型：
--
作者：
WELLS, JM;BODDY, L
本文研究了绒毛革菌、束丝孢菌、拟口蘑和白鬼笔菌丝体从0.5、2、4和8 cm（3）山毛榉（Fagus sylvatica）接种体上延伸的菌丝索系统对土壤中P-32磷的吸收。根据接种物的种类和大小，脐带系统积累了4.8%和18.7%的磷供应给土壤。非破坏性测定的磷转运到新定殖的2 cm（3）山毛榉诱饵，其特征在于一个初始稳定期，2.5至32 nmol P日（-1），持续至少12天的所有四个物种。在最初的稳定期后，易位率下降。初始菌丝体延伸和木材腐烂率也随物种和接种量而变化。磷转运率，木材腐烂或分配的土壤来源的磷在脐带系统组件之间没有明确的关系。然而，随着接种量的增加，绒螯蟹系统分配了显着更大比例的有效磷，以新的殖民诱饵。土壤来源的磷在脐带系统中的分布在何种程度上与真菌的营养保护或代谢需求有关进行了讨论。
Uptake of P-32 phosphorus from soil was investigated in mycelial cord systems of Phanerochaete velutina, Hypholoma fasciculare, Tricholomopsis platyphylla and Phallus impudicus which extended from 0.5, 2, 4 or 8 cm(3) beech (Fagus sylvatica) inocula. Cord systems accumulated between 4.8 and 18.7% of phosphorus supplied to soil, according to species and size of inoculum. Phosphorus translocation to newly-colonized 2 cm(3) beech baits, determined non-destructively, was characterized by an initial steady phase, of 2.5 to 32 nmol P day(-1) which lasted at least 12 days for all four species. After the initial steady phase, translocation rates declined. Initial mycelial extension and wood decay rates also varied with species and inoculum size. There was no dear relationship between phosphorus translocation rates, wood decay or the distribution of soil-derived phosphorus in cord system components. However, with increasing inoculum size, P. velutina systems allocated a significantly greater proportion of available phosphorus to newly-colonized baits. The degree to which distribution of soil-derived phosphorus in cord systems is related to nutrient conservation or metabolic demand in the fungi is discussed.