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 net rate of light-saturated photosynthesis measured at 25 °C and 400 ppm CO2 (A40025) on seedlings (a) and cuttings (b) of alfalfa of Mediterranean (filled symbols) and temperate (open symbols) origins. Measurements were performed on the youngest mature leaf of the main stem at the end of the experiment (i.e. node ranks 8–9 for seedlings and 12–16 for clones). 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-F2: Impact of growth temperature on the net rate of light-saturated photosynthesis measured at 25 °C and 400 ppm CO2 (A40025) on seedlings (a) and cuttings (b) of alfalfa of Mediterranean (filled symbols) and temperate (open symbols) origins. Measurements were performed on the youngest mature leaf of the main stem at the end of the experiment (i.e. node ranks 8–9 for seedlings and 12–16 for clones). The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).

Mentions: The impact of growth temperature on the net rate of light saturated photosynthesis measured under standard conditions (i.e. at a leaf temperature of 25 °C, A40025) is presented in Figure 2. A significant effect of Tgrowth on A40025 was observed in both seedlings and cuttings from temperate and Mediterranean origins (ANOVA, F6,42 > 6.1, P < 10−3). A40025 remained relatively constant over a broad range of Tgrowth between 10 and 30 °C. However, a drop at extreme Tgrowth values (5 and 35 °C) was observed for both alfalfa cultivars and cuttings. The different plant materials displayed similar response patterns, but with slight differences between seedlings and cuttings. In either plant materials, Mediterranean and temperate origins did not affect A40025 between 5 and 30 °C (ANOVA, F1,69 < 1.5, P > 0.21). Mediterranean plants displayed a decreased photosynthetic capacity at the 35 °C growth temperature (P < 0.02).Figure 2.


Intraspecific variation in thermal acclimation of photosynthesis across a range of temperatures in a perennial crop
Impact of growth temperature on the net rate of light-saturated photosynthesis measured at 25 °C and 400 ppm CO2 (A40025) on seedlings (a) and cuttings (b) of alfalfa of Mediterranean (filled symbols) and temperate (open symbols) origins. Measurements were performed on the youngest mature leaf of the main stem at the end of the experiment (i.e. node ranks 8–9 for seedlings and 12–16 for clones). 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-F2: Impact of growth temperature on the net rate of light-saturated photosynthesis measured at 25 °C and 400 ppm CO2 (A40025) on seedlings (a) and cuttings (b) of alfalfa of Mediterranean (filled symbols) and temperate (open symbols) origins. Measurements were performed on the youngest mature leaf of the main stem at the end of the experiment (i.e. node ranks 8–9 for seedlings and 12–16 for clones). The letters indicate homogeneous groups of means between the different growth temperatures (Fisher’s LSD test).
Mentions: The impact of growth temperature on the net rate of light saturated photosynthesis measured under standard conditions (i.e. at a leaf temperature of 25 °C, A40025) is presented in Figure 2. A significant effect of Tgrowth on A40025 was observed in both seedlings and cuttings from temperate and Mediterranean origins (ANOVA, F6,42 > 6.1, P < 10−3). A40025 remained relatively constant over a broad range of Tgrowth between 10 and 30 °C. However, a drop at extreme Tgrowth values (5 and 35 °C) was observed for both alfalfa cultivars and cuttings. The different plant materials displayed similar response patterns, but with slight differences between seedlings and cuttings. In either plant materials, Mediterranean and temperate origins did not affect A40025 between 5 and 30 °C (ANOVA, F1,69 < 1.5, P > 0.21). Mediterranean plants displayed a decreased photosynthetic capacity at the 35 °C growth temperature (P < 0.02).Figure 2.

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.