Environmental stratification and performance of Coffea canephora clones grown in the Western Amazon

Moraes, Marcos Santana; Rocha, Rodrigo Barros; Ferreira, Fábio Medeiros; Souza, Carolina Augusto de; Espindula, Marcelo Curitiba; Teixeira, Alexsandro Lara

doi:10.25186/.v16i.1907

Cited by 1 publication

(1 citation statement)

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“…Thus, considering the continuous rise in global demand for coffee, there is an urgent need to improve the C. canephora production. However, this increase in coffee production must be coordinated with strategies that minimize the environmental impacts associated with the expansion in land cultivation (San Martin Ruiz et al, 2021), especially in areas already threatened by anthropogenic disturbances, such as the Amazon (Silva Junior et al, 2021), a traditional region for coffee production (Junior et al, 2021; Moraes et al, 2021). Although challenging, an alternative to improve the sustainability of coffee cultivation would involve the increase in production per land area, which may be achieved through a better characterization of the physiological traits associated with coffee yield to allow the selection/generation of improved cultivars.…”

Section: Introductionmentioning

confidence: 99%

A bitter future for coffee production? Physiological traits associated with yield reveal high vulnerability to hydraulic failure in Coffea canephora

Max

Loram‐Lourenço²,

Silva³

et al. 2022

Plant Cell & Environment

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The increase in frequency and intensity of drought events have hampered coffee production in the already threatened Amazon region, yet little is known about key aspects underlying the variability in yield potential across genotypes, nor to what extent higher productivity is linked to reduced drought tolerance. Here we explored how variations in morphoanatomical and physiological leaf traits can explain differences in yield and vulnerability to embolism in 11 Coffea canephora genotypes cultivated in the Western Amazon. The remarkable variation in coffee yield across genotypes was tightly related to differences in their carbon assimilation and water transport capacities, revealing a diffusive limitation to photosynthesis linked by hydraulic constraints. Although a clear trade‐off between water transport efficiency and safety was not detected, all the studied genotypes operated in a narrow and/or negative hydraulic safety margin, suggesting a high vulnerability to leaf hydraulic failure (HF), especially on the most productive genotypes. Modelling exercises revealed that variations in HF across genotypes were mainly associated with differences in leaf water vapour leakage when stomata are closed, reflecting contrasting growth strategies. Overall, our results provide a new perspective on the challenges of sustaining coffee production in the Amazon region under a drier and warmer climate.

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