Ecophysiological response in leaves of Caragana microphylla to different soil phosphorus levels

Title:

Ecophysiological response in leaves of Caragana microphylla to different soil phosphorus levels

Creator:

Zhao, T. T., Zhao, N. X., and Gao, Y. B.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:80b701ce-095d-452e-8bb7-c1e45392dfcb
uuid:80b701ce-095d-452e-8bb7-c1e45392dfcb
issn:0300-3604
doi:10.1007/s11099-013-0016-3

Subject:

botanika, botany, adaptive strategy, leaf functional traits, leaf phosphorus allocation, soil phosphorus level, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Phosphorus (P) is one of the limiting mineral nutrient elements in the typical steppe of Inner Mongolia, China. In order to find out the adaptive strategy of Caragana microphylla to low soil P status, we grew plants in P-deficient soil in April 2009 and gave a gradient of P addition ranging from 0 to 60 mg(P) kg-1(soil) from May 2010. Leaf traits were measured in September 2010. Both leaf growth and light-saturated photosynthetic rate (P max) were similar among different groups. Leaf nitrogen (N):P ratio indicated that the growth of C. microphylla was not P-limited in most of the Inner Mongolia typical steppe, which had an average soil available P content equal to 3.61 mg kg-1. The optimal P addition was 20 mg(P) kg-1(soil) for two-year-old plants of C. microphylla. Leaf mass area (LMA) and leaf dry matter content (LDMC) were enhanced with low P, and significantly negatively correlated with photosynthetic N-use efficiency (PNUE). Photosynthetic P-use efficiency (PPUE) increased with decreasing soil P and increasing leaf inorganic P (Pi): organic P (Po) ratio, and showed no significant negative correlation with LMA or LDMC. P max of C. microphylla did not decline so sharply as it was anticipated. The reason for this phenomenon might be due to the increased PPUE through regulating the leaf total P allocation. C. microphylla had high P-use efficiency via both high PPUE and long P-retention time at low-P supply. The adaptation of C. microphylla to low-P supply provided a new explanation for the increased distribution of the species in the degraded natural grassland in Inner Mongolia, China., T. T. Zhao, N. X. Zhao, Y. B. Gao., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

245-251

Source:

Photosynthetica | 2013 Volume:51 | Number:2

Harvested from:

CDK

Metadata only:

false