Limits...
Intraspecific variation in thermal acclimation of photosynthesis across a range of temperatures in a perennial crop

View Article: PubMed Central - PubMed

ABSTRACT

Plants acclimate to the thermal regime they experience. We analysed intra-specific variations in the thermal acclimation of photosynthesis in a perennial herbaceous crop by comparing cultivars from contrasting origins grown at a range of temperatures. It was concluded that both temperate and Mediterranean cultivars display strong patterns of thermal acclimation in the 5-40°C range. No evidence of superior performance was found for Mediterranean genotypes at high temperatures.

No MeSH data available.


Impact of growth temperature on the maximum catalytic rate of Rubisco (Vcmax25, a), the maximum electron transport rate (Jmax25, b) and their ratio (c, Jmax25/Vcmax25) for two alfalfa genotypes of Mediterranean (filled triangles, 7_7) and temperate (open triangles, G3) origins. The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4940478&req=5

plw035-F4: Impact of growth temperature on the maximum catalytic rate of Rubisco (Vcmax25, a), the maximum electron transport rate (Jmax25, b) and their ratio (c, Jmax25/Vcmax25) for two alfalfa genotypes of Mediterranean (filled triangles, 7_7) and temperate (open triangles, G3) origins. The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).

Mentions: The photosynthetic parameters determined under standard conditions are presented in Figure 4 at the different growth temperatures. The Vcmax25 and Jmax25 parameters were significantly affected by Tgrowth (ANOVA, F5,12 > 15.9, P < 10−3). Vcmax25 values remained constant between 10 and 30 °C, but were lower at 5 and 35 °C. The values of Jmax25, on the other hand, decreased between 10 and 30 °C and presented a relatively more limited drop at 5 °C. Overall, the Jmax25/Vcmax25 ratio fell regularly for leaves grown at between 5 and 35 °C (Fig. 4c). No significant differences between genotypes from temperate and Mediterranean origins were observed (ANOVA, F =1.4, P > 0.29), except at 35 °C where the declines in both Vcmax25 and Jmax25 were more pronounced in the Mediterranean genotype (heat-bleached leaves).Figure 4.


Intraspecific variation in thermal acclimation of photosynthesis across a range of temperatures in a perennial crop
Impact of growth temperature on the maximum catalytic rate of Rubisco (Vcmax25, a), the maximum electron transport rate (Jmax25, b) and their ratio (c, Jmax25/Vcmax25) for two alfalfa genotypes of Mediterranean (filled triangles, 7_7) and temperate (open triangles, G3) origins. The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940478&req=5

plw035-F4: Impact of growth temperature on the maximum catalytic rate of Rubisco (Vcmax25, a), the maximum electron transport rate (Jmax25, b) and their ratio (c, Jmax25/Vcmax25) for two alfalfa genotypes of Mediterranean (filled triangles, 7_7) and temperate (open triangles, G3) origins. The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).
Mentions: The photosynthetic parameters determined under standard conditions are presented in Figure 4 at the different growth temperatures. The Vcmax25 and Jmax25 parameters were significantly affected by Tgrowth (ANOVA, F5,12 > 15.9, P < 10−3). Vcmax25 values remained constant between 10 and 30 °C, but were lower at 5 and 35 °C. The values of Jmax25, on the other hand, decreased between 10 and 30 °C and presented a relatively more limited drop at 5 °C. Overall, the Jmax25/Vcmax25 ratio fell regularly for leaves grown at between 5 and 35 °C (Fig. 4c). No significant differences between genotypes from temperate and Mediterranean origins were observed (ANOVA, F =1.4, P > 0.29), except at 35 °C where the declines in both Vcmax25 and Jmax25 were more pronounced in the Mediterranean genotype (heat-bleached leaves).Figure 4.

View Article: PubMed Central - PubMed

ABSTRACT

Plants acclimate to the thermal regime they experience. We analysed intra-specific variations in the thermal acclimation of photosynthesis in a perennial herbaceous crop by comparing cultivars from contrasting origins grown at a range of temperatures. It was concluded that both temperate and Mediterranean cultivars display strong patterns of thermal acclimation in the 5-40&deg;C range. No evidence of superior performance was found for Mediterranean genotypes at high temperatures.

No MeSH data available.