Correlating Coffea canephora 3D architecture to plant photosynthesis at a daily scale and vegetative biomass allocation

Miroslava Rakocevic, Danilo Força Baroni, Guilherme Augusto Rodrigues de Souza, Wallace de Paula Bernado, Cláudio Martins de Almeida, Fábio Takeshi Matsunaga, Weverton Pereira Rodrigues, José Cochicho Ramalho, Eliemar Campostrini

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Coffea canephora (C. canephora) has two botanical varieties, Robusta and Conilon. Intraspecific variability was hypothesized and projected for the selection of C. canephora plants able to maintain production in the context of global climate changes. For that, architectural, C-assimilation and biomass analyses were performed on 17-month-old Robusta (clones 'A1' and '3 V') and Conilon (clones '14' and '19') varieties grown in non-limiting soil, water and mineral nutrient conditions. Nondestructive coffee plant architecture coding, reconstruction and plant photosynthesis estimations were performed using a functional-structural plant modeling platform OpenAlea. 3D reconstructions and inclusion of parameters calculated and estimated from light response curves, such as dark respiration (R-d), maximum rate of carboxylation of RuBisCO and photosynthetic electron transport allowed the estimation of instantaneous and daily plant photosynthesis. The virtual orchard leaf area index was low, and light was not a limiting factor in early C. canephora development stages. Under such conditions, Robusta assimilated more CO2 at the plant and orchard scale and produced higher total biomass than Conilon. Lower plant daily photosynthesis and total biomass were correlated to higher R-d in Conilon than in Robusta. Among the architectural traits, leaf inclination, size and allometry were most highly correlated with plant assimilation and biomass. Relative allocation in leaf biomass was higher in '19' Conilon than in young Robusta plants, indicating intraspecific biomass partitioning. Similarly, variation in relative distribution of the root biomass and the root volume reflected clonal variation in soil occupation, indicating intraspecific variability in space occupation competitiveness. Coffea canephora denoted high root allocation in both Conilon and Robusta clones. However, relevant differences at subspecific levels were found, indicating the high potential of C. canephora to cope with drought events, which are expected to occur more frequently in the future, because of climate changes. The methodology developed here has the potential to be used for other crops and tree species.
Original languageEnglish
Pages (from-to)556–574
JournalTree Physiology
Volume43
Issue number4
Early online dateDec 2022
DOIs
Publication statusPublished - Apr 2023

Keywords

  • branching order
  • Conilon
  • daily assimilation
  • leaf area
  • plant architecture
  • reiteration
  • respiration
  • Robusta

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