Seasonal changes in photosynthetic activity and photochemical efficiency of the Mediterranean shrub<i>Phillyrea angustifolia</i>L

Vitale, Luca; Arena, Carmen; Santo, A. Vírzo De

doi:10.1080/11263504.2011.651507

Cited by 28 publications

(26 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This decrease was linked to a significant reduction in the efficiency of electron transport (ETo/ABS), as well as an increase in the energy dissipation rate at the PSII antenna (DIo/ABS). Such evidence is usually associated with a protective mechanism against winter stress (Baquedano & Castillo 2006, Arena et al 2008, Vitale et al 2012. Tree shelter protection may have limited the severity of winter stress in protected seedlings, reducing their need for photoprotection.…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

Is tree shelter protection an effective complement to weed competition management in improving the morpho-physiological response of holm oak planted seedlings?

Ceacero¹,

Navarro-Cerrillo²,

Díaz-Hernández³

et al. 2014

iForest

View full text Add to dashboard Cite

Section: Chlorophyll Fluorescencementioning

confidence: 99%

Is tree shelter protection an effective complement to weed competition management in improving the morpho-physiological response of holm oak planted seedlings?

Ceacero¹,

Navarro-Cerrillo²,

Díaz-Hernández³

et al. 2014

iForest

View full text Add to dashboard Cite

“…Nevertheless, increments in E cannot be explained only by increments in g s , but also by increases in VPD. In the morning, the decrease in g s of P. australis and C. chinensis from 9:00 to 11:00 was related to the increase in VPD, a response also observed in citrus (Machado et al 2002;Vitale et al 2012) to prevent excessive shoot dehydration. Even under low g s at 11:00, the higher VPD caused increased E. High values of VPD (1.5 kPa) affect the leaf gas exchange.…”

mentioning

confidence: 91%

Photosynthetic characterization of three dominant plant species in the saline–alkaline soil of the Yellow River Delta, China

Zhang

Shao

2014

Plant Biosystems - An International Journal Dealing with all As

View full text Add to dashboard Cite

The diurnal variations of photosynthesis of three dominant species, including Glycine soja, Phragmites australis, and Cynanchum chinensis, in the Yellow River Delta in China have been studied under the same natural conditions using a Li-6400 portable photosynthesis system. The results showed that the curves of diurnal variations of net photosynthetic rate (P N ) of the three plants were different. The diurnal variation of P N on C. chinensis was a midday depression pattern and had two peaks. However, P N of G. soja and P. australis showed single-peak curves. The transpiration rate (E) of G. soja was significantly higher than that of P. australis and C. chinensis, both showed single-peak curves. In general, the diurnal course of stomatal conductance (g s ) followed the same pattern of P N . A similar diurnal pattern of intercellular CO 2 concentration (C i ), vapor pressure deficit (VPD), and water use efficiency (WUE) was observed among different species. VPD showed single-peak curves, while WUE was characterized by double-peak curves, which was contrary to C i . Linear correlations among photosynthetic variables and key environmental factors indicate high positive correlations between P N and E, P N and photosynthetic active radiation, P N and leaf temperature (T leaf ), P N and VPD, and between P N and g s except C. chinensis. Negative correlations among P N and relative humidity, P N and C i were found. The irradiance response curves derived from the leaves were substantially affected by different species. C. chinensis showed highest apparent quantum efficiency, followed by P. australis and G. soja, while apparent dark respiration (R d ), convexity (k), light saturation point, and maximum gross CO 2 assimilation rate (P max ) of G. soja were higher than those of P. australis and C. chinensis. The irradiance response curve of P N and WUE of different plant species followed the same order: G. soja . C. chinensis . P. australis. They were both higher than most of other species. It was concluded that plant species adapting to the saline -alkaline habitat showed higher photosynthesis. In addition, G. soja is also effective to improve saline -alkaline soil quality.

show abstract

“…However, the vegetation type in a certain area showed a markedly patchy distribution, especially on a small scale, due to human activities. When considering a small region, different vegetation types revealed a differential effect on photosynthesis (Arena et al 2008;Vitale et al 2012), root growth (Tahi et al 2007), and CO 2 efflux (Kuzyakov and Cheng 2004). The influence of vegetation type on soil respiration has been well documented at the latitudinal level (Kane et al 2003;Kang et al 2003); however, the effects of patchy distribution of vegetation on soil CO 2 efflux are still elusive.…”

Section: Introductionmentioning

confidence: 99%

Response of soil respiration to temperature and soil moisture: Effects of different vegetation types on a small scale in the eastern Loess Plateau of China

Yan

et al. 2013

Plant Biosystems - An International Journal Dealing with all As

View full text Add to dashboard Cite

Soil respiration is affected by vegetation and environmental conditions. The purpose of this study was to investigate the effect of vegetation type on soil respiration, temperature and water content, and their correlations on a small scale. We measured soil respiration rate (R s ) over a 3-year period at biweekly intervals in three plots in the eastern Loess Plateau of China, with the same soil texture but different vegetation types: pine forest, grassland, and shrub land. Simultaneously, soil temperature (T s ) at 10 cm depth and soil water content (W s ) within 10 cm depth were measured. The seasonal course of R s and T s showed a similar temporal variation in the three plots, with higher values in summer and autumn and lower values in winter and spring. No significant differences (P . 0.05) were found between plots, except for W s . The mean cumulative release of CO 2 efflux from March to December was 962.5, 1027.5, and 1166.5 g C m 22 a 21 for plots 1, 2, and 3, respectively, with no significant difference between plots. The fitted exponential equations of R s versus T s from the 3-year data-set were significant (P , 0.05) with an R 2 of 0.72, 0.64, and 0.72 for plots 1, 2, and 3, respectively. The calculated Q 10 from the parameters of the fitted equation was 3.57, 3.52, and 3.61, and the R 10 was 2.36, 2.03, and 2.37 mmol CO 2 m 22 s 21 for plots 1, 2, and 3, respectively. Compared with the T s , the correlations between R s and W s were not significant for the three plots. However, if the T s was above 108C, then their correlation was significant, and W s had an impact on R s . Four combined regression equations including two variables of T s and W s could be well established to model correlations between R s and both T s and W s . Our study demonstrated that the exponential and power model fitted best and no significant different correlations of combined equations existed between the three plots. These results show that vegetation type had little impact on R s , T s , W s , and their correlations, as well as on related parameters such as Q 10 and R 10 . Therefore, while doing R s research in a horizontal patchy vegetation conditions on a small area, the sampling location of measurements should focus on vertical dominant vegetation and ignore patch vegetation so as to reduce field work load.

show abstract

Seasonal changes in photosynthetic activity and photochemical efficiency of the Mediterranean shrubPhillyrea angustifoliaL

Cited by 28 publications

References 47 publications

Is tree shelter protection an effective complement to weed competition management in improving the morpho-physiological response of holm oak planted seedlings?

Is tree shelter protection an effective complement to weed competition management in improving the morpho-physiological response of holm oak planted seedlings?

Photosynthetic characterization of three dominant plant species in the saline–alkaline soil of the Yellow River Delta, China

Response of soil respiration to temperature and soil moisture: Effects of different vegetation types on a small scale in the eastern Loess Plateau of China

Contact Info

Product

Resources

About