Stomatal and Non-Stomatal Leaf Responses during Two Sequential Water Stress Cycles in Young Coffea canephora Plants DOI Creative Commons
Danilo Força Baroni, Guilherme Augusto Rodrigues de Souza,

Wallace de Paula Bernado

и другие.

Stresses, Год журнала: 2024, Номер 4(3), С. 575 - 597

Опубликована: Сен. 9, 2024

Understanding the dynamics of physiological changes involved in acclimation responses plants after their exposure to repeated cycles water stress is crucial selecting resilient genotypes for regions with recurrent drought episodes. Under such background, we tried respond questions as: (1) Are there differences stomatal-related and non-stomatal during different clones Coffea canephora Pierre ex A. Froehner? (2) Do these C. show a response each two sequential events? (3) Is one previous event sufficient induce kind “memory” canephora? Seven-month-old (’3V’ ‘A1’, previously characterized as deeper lesser deep root growth, respectively) were maintained well-watered (WW) or fully withholding irrigation, inducing soil (WS) until matric potential (Ψmsoil) reached ≅ −0.5 MPa (−500 kPa) at depth 500 mm. Two events (drought-1 drought-2) attained this Ψmsoil 19 days followed by rewatering complete recovery leaf net CO2 assimilation rate (Anet) recovery-1 recovery-2 events. The gas exchange, chlorophyll fluorescence, reflectance parameters measured six-day frequency, while anatomy was examined only end second cycle. In both events, WS showed reduction stomatal conductance transpiration. internal diffusion observed cycle, expressed increased thickness spongy parenchyma clones. Those anatomical traits impacted decreasing Anet ‘3V’ less influenced than ‘A1’ genotype Anet, effective quantum yield PSII photochemistry, photochemical quenching, linear electron transport rate, index drought-1, but drought-2 an advantage disappeared. Such supported medium xylem vessel area diminished under WS. cycles, all usually 12 rewatering. absence impacts, namely maximum primary reactions, photosynthetic performance index, density reaction centers capable QA event, might result from some improved stress, suggesting effects drought.

Язык: Английский

Stomatal and Non-Stomatal Leaf Responses during Two Sequential Water Stress Cycles in Young Coffea canephora Plants DOI Creative Commons
Danilo Força Baroni, Guilherme Augusto Rodrigues de Souza,

Wallace de Paula Bernado

и другие.

Stresses, Год журнала: 2024, Номер 4(3), С. 575 - 597

Опубликована: Сен. 9, 2024

Understanding the dynamics of physiological changes involved in acclimation responses plants after their exposure to repeated cycles water stress is crucial selecting resilient genotypes for regions with recurrent drought episodes. Under such background, we tried respond questions as: (1) Are there differences stomatal-related and non-stomatal during different clones Coffea canephora Pierre ex A. Froehner? (2) Do these C. show a response each two sequential events? (3) Is one previous event sufficient induce kind “memory” canephora? Seven-month-old (’3V’ ‘A1’, previously characterized as deeper lesser deep root growth, respectively) were maintained well-watered (WW) or fully withholding irrigation, inducing soil (WS) until matric potential (Ψmsoil) reached ≅ −0.5 MPa (−500 kPa) at depth 500 mm. Two events (drought-1 drought-2) attained this Ψmsoil 19 days followed by rewatering complete recovery leaf net CO2 assimilation rate (Anet) recovery-1 recovery-2 events. The gas exchange, chlorophyll fluorescence, reflectance parameters measured six-day frequency, while anatomy was examined only end second cycle. In both events, WS showed reduction stomatal conductance transpiration. internal diffusion observed cycle, expressed increased thickness spongy parenchyma clones. Those anatomical traits impacted decreasing Anet ‘3V’ less influenced than ‘A1’ genotype Anet, effective quantum yield PSII photochemistry, photochemical quenching, linear electron transport rate, index drought-1, but drought-2 an advantage disappeared. Such supported medium xylem vessel area diminished under WS. cycles, all usually 12 rewatering. absence impacts, namely maximum primary reactions, photosynthetic performance index, density reaction centers capable QA event, might result from some improved stress, suggesting effects drought.

Язык: Английский

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