Vanessa Celiz - Academia.edu (original) (raw)

Papers by Vanessa Celiz

Research paper thumbnail of Results of two-way ANOVA of the impact of night temperature on gas exchange parameters

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Results of two-way ANOVA of the impact of night temperature on chlorophyll fluorescence parameters

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Changes in (A) maximum efficiency of PSII photochemistry after dark adaptation (F<sub>v</sub>/F<sub>m</sub>), (B) effective PSII quantum yield (ΦPSII), (C) photochemical quenching (q<sub>P</sub>) and (D) non-photochemical quenching (q<sub>NP</sub>) in control and 4°C, 0°C or −3°C-treated flowers

<p>Measurements were performed 2, 24, 48, 120 and 192 h after cold treatment. Values are me... more <p>Measurements were performed 2, 24, 48, 120 and 192 h after cold treatment. Values are means ± standard errors (n = 45).</p

Research paper thumbnail of Results of one-way ANOVA of the impact of night temperature on net photosynthesis (Pn) and stalk non-photochemical quenching (q<sub>NP</sub>), compared to the control, at each time point. PS, post stress

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Adaptation of Grapevine Flowers to Cold Involves Different Mechanisms Depending on Stress Intensity

PLoS ONE, 2012

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.

Research paper thumbnail of Content, expressed as % fresh weight (FW), of (A) glucose, (B) fructose, (C) sucrose and (D) starch in control and 4°C, 0°C or −3°C-treated inflorescences

<p>Measurements were performed 2, 24 and 48 h after cold treatment. Values are means ± stan... more <p>Measurements were performed 2, 24 and 48 h after cold treatment. Values are means ± standard errors (n = 27).</p

Research paper thumbnail of Adaptation of Grapevine Flowers to Cold Involves Different Mechanisms Depending on Stress Intensity

PLoS ONE, 2012

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.

Research paper thumbnail of Adaptation of grapevine flowers to cold involves different mechanisms depending on stress intensity

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.

Research paper thumbnail of Results of two-way ANOVA of the impact of night temperature on gas exchange parameters

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Results of two-way ANOVA of the impact of night temperature on chlorophyll fluorescence parameters

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Changes in (A) maximum efficiency of PSII photochemistry after dark adaptation (F<sub>v</sub>/F<sub>m</sub>), (B) effective PSII quantum yield (ΦPSII), (C) photochemical quenching (q<sub>P</sub>) and (D) non-photochemical quenching (q<sub>NP</sub>) in control and 4°C, 0°C or −3°C-treated flowers

<p>Measurements were performed 2, 24, 48, 120 and 192 h after cold treatment. Values are me... more <p>Measurements were performed 2, 24, 48, 120 and 192 h after cold treatment. Values are means ± standard errors (n = 45).</p

Research paper thumbnail of Results of one-way ANOVA of the impact of night temperature on net photosynthesis (Pn) and stalk non-photochemical quenching (q<sub>NP</sub>), compared to the control, at each time point. PS, post stress

<p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), ... more <p>Significant results at P≤0.05 (*), P≤0.01 (**), P≤0.001 (***) and not significant (ns), respectively.</p

Research paper thumbnail of Adaptation of Grapevine Flowers to Cold Involves Different Mechanisms Depending on Stress Intensity

PLoS ONE, 2012

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.

Research paper thumbnail of Content, expressed as % fresh weight (FW), of (A) glucose, (B) fructose, (C) sucrose and (D) starch in control and 4°C, 0°C or −3°C-treated inflorescences

<p>Measurements were performed 2, 24 and 48 h after cold treatment. Values are means ± stan... more <p>Measurements were performed 2, 24 and 48 h after cold treatment. Values are means ± standard errors (n = 27).</p

Research paper thumbnail of Adaptation of Grapevine Flowers to Cold Involves Different Mechanisms Depending on Stress Intensity

PLoS ONE, 2012

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.

Research paper thumbnail of Adaptation of grapevine flowers to cold involves different mechanisms depending on stress intensity

Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To inve... more Grapevine flower development and fruit set are influenced by cold nights in the vineyard. To investigate the impact of cold stress on carbon metabolism in the inflorescence, we exposed the inflorescences of fruiting cuttings to chilling and freezing temperatures overnight and measured fluctuations in photosynthesis and sugar content. Whatever the temperature, after the stress treatment photosynthesis was modified in the inflorescence, but the nature of the alteration depended on the intensity of the cold stress. At 4uC, photosynthesis in the inflorescence was impaired through non-stomatal limitations, whereas at 0uC it was affected through stomatal limitations. A freezing night (23uC) severely deregulated photosynthesis in the inflorescence, acting primarily on photosystem II. Cold nights also induced accumulation of sugars. Soluble carbohydrates increased in inflorescences exposed to 23uC, 0uC and 4uC, but starch accumulated only in inflorescences of plants treated at 0 and 23uC. These results suggest that inflorescences are able to cope with cold temperatures by adapting their carbohydrate metabolism using mechanisms that are differentially induced according to stress intensity.