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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Eucalypts and low phosphorus availability: between responsiveness and efficiency

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Author(s):
Bulgarelli, Rafaela Gageti [1] ; de Oliveira Silva, Franklin Magnum [1] ; Bichara, Samir [1] ; Andrade, Sara Adrian L. [1] ; Mazzafera, Paulo [1, 2]
Total Authors: 5
Affiliation:
[1] Univ Estadual Campinas, Dept Plant Biol, Inst Biol, BR-13083970 Campinas - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Crop Prod, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: PLANT AND SOIL; v. 445, n. 1-2, SI OCT 2019.
Web of Science Citations: 0
Abstract

Background and aims Twenty-four species of eucalypts were studied regarding their ability to grow under low P and their responsiveness to P inputs. Methods Growth and photosynthesis-related parameters were evaluated. Results Growth of all species was influenced by low P availability. No significant correlation was found between leaf P concentration and biomass, indicating that P concentrations in leaves cannot be solely considered an indication of the responsiveness to P in eucalypts. Species responsive to P-input (high agronomic P efficiency values, APE) were those with low P use efficiency - PUE (here assessed as relative efficiency of P-use, REP) and low P uptake efficiency (PUpE). But, non-responsive species were related to higher P-efficiency under low soil P-availability. Eucalyptus tereticornis, E. cladocalyx, E. globulus and E. camaldulensis were efficient under low-P availability. Whereas, E. crebra and E acmenoides were the most responsive species, with high APE, suggesting that for these species P-inputs are needed to guarantee plant growth. The root:shoot ratio remained constant at different P availabilities, suggesting that biomass allocation towards the root in response to P and greater investment in roots were not correlated with greater PUE. Under limited P, E. robusta and E. botryoides exhibited low foliar P contents and higher root:shoot ratios than those of other species with higher P contents, indicating that greater root investment does not necessarily result in greater PUE. Conclusion The results suggest that the divergence among species is probably related to different mechanisms, which may improve P-use efficiency. (AU)

FAPESP's process: 17/21738-9 - Response to phosphorus availability in eucalyptus species seedlings: growth and photosynthetic characteristics of the leaves
Grantee:Samir Bichara
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 16/25498-0 - Phosphorus use efficiency in Eucalyptus and the physiological and genetic mechanisms involved
Grantee:Paulo Mazzafera
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/09624-0 - Biochemistry of phosphorus use efficiency in eucalyptus
Grantee:Franklin Magnum de Oliveira Silva
Support type: Scholarships in Brazil - Post-Doctorate