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Growth and physiological responses of isohydric and anisohydric poplars to drought.

Attia Z, Domec JC, Oren R, Way DA, Moshelion M - J. Exp. Bot. (2015)

Bottom Line: Low gs of the isohydric BS under drought reduced CO2 assimilation rates and biomass potential under moderate water stress.Overall, the results indicate three strategies for how closely related biomass species deal with water stress: survival-isohydric (BS), sensitive-anisohydric (BSxSI), and resilience-anisohydric (SI).Implications for woody biomass growth, water-use efficiency, and survival under variable environmental conditions are discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.

No MeSH data available.


Related in: MedlinePlus

(A) Whole-plant cumulative water loss, (B) cumulative plant weight gain, (C) agricultural WUE (cumulative transpiration to cumulative weight gain ratio), and (D) growth normalized to cut diameter (g fresh mass/mm) in three poplar genotypes grown under well-irrigated conditions in a semi-controlled greenhouse. Data are shown as means ± SE: for (A-C), BS (n = 4), SI (n = 15), and BSxSI (n = 19); for (D) BS (n = 5), SI (n = 6), and BSxSI (n = 16). White, BS; grey, SI; black, BSxSI. Different letters above the columns indicate significant differences between the genotypes for each day, according to Tukey’s HSD test, P < 0.05.
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Figure 4: (A) Whole-plant cumulative water loss, (B) cumulative plant weight gain, (C) agricultural WUE (cumulative transpiration to cumulative weight gain ratio), and (D) growth normalized to cut diameter (g fresh mass/mm) in three poplar genotypes grown under well-irrigated conditions in a semi-controlled greenhouse. Data are shown as means ± SE: for (A-C), BS (n = 4), SI (n = 15), and BSxSI (n = 19); for (D) BS (n = 5), SI (n = 6), and BSxSI (n = 16). White, BS; grey, SI; black, BSxSI. Different letters above the columns indicate significant differences between the genotypes for each day, according to Tukey’s HSD test, P < 0.05.

Mentions: The different genotypes varied in leaf size and number (Fig. 3A,B). BS and BSxSI had bigger leaves than SI seedlings (Fig 3B,C), but SI plants had more leaves per plant, such that there was a larger total leaf area in SI plants than in the other two genotypes (Fig 3D,E). Owing to its lower total leaf area and stomatal density (Fig. 3F), BS plants had the lowest stomatal number per plant (i.e. the gas exchange capacity per plant), while SI seedlings had the highest. Under well-watered conditions, the BS genotype also had significantly lower growth rates than the two anisohydric genotypes (Figure 4D).


Growth and physiological responses of isohydric and anisohydric poplars to drought.

Attia Z, Domec JC, Oren R, Way DA, Moshelion M - J. Exp. Bot. (2015)

(A) Whole-plant cumulative water loss, (B) cumulative plant weight gain, (C) agricultural WUE (cumulative transpiration to cumulative weight gain ratio), and (D) growth normalized to cut diameter (g fresh mass/mm) in three poplar genotypes grown under well-irrigated conditions in a semi-controlled greenhouse. Data are shown as means ± SE: for (A-C), BS (n = 4), SI (n = 15), and BSxSI (n = 19); for (D) BS (n = 5), SI (n = 6), and BSxSI (n = 16). White, BS; grey, SI; black, BSxSI. Different letters above the columns indicate significant differences between the genotypes for each day, according to Tukey’s HSD test, P < 0.05.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4493787&req=5

Figure 4: (A) Whole-plant cumulative water loss, (B) cumulative plant weight gain, (C) agricultural WUE (cumulative transpiration to cumulative weight gain ratio), and (D) growth normalized to cut diameter (g fresh mass/mm) in three poplar genotypes grown under well-irrigated conditions in a semi-controlled greenhouse. Data are shown as means ± SE: for (A-C), BS (n = 4), SI (n = 15), and BSxSI (n = 19); for (D) BS (n = 5), SI (n = 6), and BSxSI (n = 16). White, BS; grey, SI; black, BSxSI. Different letters above the columns indicate significant differences between the genotypes for each day, according to Tukey’s HSD test, P < 0.05.
Mentions: The different genotypes varied in leaf size and number (Fig. 3A,B). BS and BSxSI had bigger leaves than SI seedlings (Fig 3B,C), but SI plants had more leaves per plant, such that there was a larger total leaf area in SI plants than in the other two genotypes (Fig 3D,E). Owing to its lower total leaf area and stomatal density (Fig. 3F), BS plants had the lowest stomatal number per plant (i.e. the gas exchange capacity per plant), while SI seedlings had the highest. Under well-watered conditions, the BS genotype also had significantly lower growth rates than the two anisohydric genotypes (Figure 4D).

Bottom Line: Low gs of the isohydric BS under drought reduced CO2 assimilation rates and biomass potential under moderate water stress.Overall, the results indicate three strategies for how closely related biomass species deal with water stress: survival-isohydric (BS), sensitive-anisohydric (BSxSI), and resilience-anisohydric (SI).Implications for woody biomass growth, water-use efficiency, and survival under variable environmental conditions are discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.

No MeSH data available.


Related in: MedlinePlus