Effect of Magnesium on Gas Exchange and Photosynthetic Efficiency of Coffee Plants Grown under Different Light Levels

Kaio Gonçalves de Lima Dias, Paulo Tácito Gontijo Guimarães, Antônio Eduardo Furtini Neto, Helbert Rezende Oliveira de Silveira and Julian Junio de Jesus Lacerda
Additional contact information
Kaio Gonçalves de Lima Dias: Departamento de Ciência do Solo/DCS, Universidade Federal de Lavras/UFLA, Cx. P. 3037, 37200-000 Lavras-MG, Brazil
Paulo Tácito Gontijo Guimarães: Empresa de Pesquisa Agropecuária de Minas Gerais/EPAMIG, Cx. P. 176, 37200-000 Lavras-MG, Brazil, paulotgg@epamig.ufla.br
Antônio Eduardo Furtini Neto: Instituto Tecnológico Vale Desenvolvimento Sustentável, 66055-090 Belém-PA, Brazil, furtinineto@gmail.com
Helbert Rezende Oliveira de Silveira: Empresa de Pesquisa Agropecuária de Minas Gerais/EPAMIG, Cx. P. 176, 37200-000 Lavras-MG, Brazil, herosrezende@yahoo.com.br
Julian Junio de Jesus Lacerda: Campus Professora Cinobelina Elvas, Universidade Federal do Piauí, Rodovia Municipal Bom Jesus Viana, km 1, 64900-000 Bom Jesus-PI, Brazil, julianlacerda@gmail.com

Agriculture, 2017, vol. 7, issue 10, 1-11

Abstract: The aim of the present study was to investigate the effects of magnesium on the gas exchange and photosynthetic efficiency of Coffee seedlings grown in nutrient solution under different light levels. The experiment was conducted under controlled conditions in growth chambers and nutrient solution at the Department of Plant Pathology of the Federal University of Lavras. The treatments consisted of five different Mg concentrations (0, 48, 96, 192 and 384 mg·L −1 ) and four light levels (80, 160, 240 and 320 µmol photon m −2 ·s −1 ). Both the Mg concentration and light levels affected gas exchange in the coffee plants. Photosynthesis increased linearly with the increasing light, indicating that the light levels tested were low for this crop. The highest CO 2 assimilation rate, lowest transpiration, and highest water use efficiency were observed with 250 mg·Mg·L −1 , indicating that this concentration was the optimal Mg supply for the tested light levels.

Keywords: coffee plant nutrition; photoinhibition; photoprotection; leaf scald (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/7/10/85/pdf (application/pdf)
https://www.mdpi.com/2077-0472/7/10/85/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:7:y:2017:i:10:p:85-:d:113801

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().