Different responses of absorptive roots and arbuscular mycorrhizal fungi to fertilization provide diverse nutrient acquisition strategies in Chinese fir

Different responses of absorptive roots and arbuscular mycorrhizal fungi to fertilization provide diverse nutrient acquisition strategies in Chinese fir

https://ift.tt/2Onf5ZT

Publication date: 15 February 2019

Source: Forest Ecology and Management, Volume 433

Author(s): Liang Li, M. Luke McCormack, Fusheng Chen, Huimin Wang, Zeqing Ma, Dali Guo

Abstract

Absorptive roots and arbuscular mycorrhizal fungi (AMF) constitute two related pathways for plant nutrient acquisition. However, if and how soil nutrient availability can regulate the integrated pattern of roots and AMF remain unclear. We analyzed the abundance and morphology of absorptive roots and AMF as well as the intraradical AMF community composition in response to four-year nitrogen (N) and phosphorus (P) additions in a Chinese fir (Cunninghamia lanceolata) plantation. Absorptive root biomass, length density and tissue density significantly decreased, and specific root length significantly increased with P addition. However, none of these root characteristics were significantly affected by N addition. In contrast, extraradical hyphal length density in the rhizosphere soil and the ratio of hyphal length density to mycorrhizal colonization rate significantly decreased with N addition, but remained unchanged under P addition while extraradical hyphal length density in the ingrowth mesh bags significantly decreased with both N and P additions. The relative abundance of Acaulosporaceae and Gigasporaceae increased and that of Glomeraceae decreased with P, while N addition did not significantly shift AMF community composition. Our findings indicate that the responses of absorptive roots and AMF to N addition in the Chinese fir plantation differ from their responses to P addition, suggesting diverse strategies for a single tree species to adjust to multiple soil nutrient conditions.

Superforest

via ScienceDirect Publication: Forest Ecology and Management https://ift.tt/2zaqiu8

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s