Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

Siam, Abubakr M.J.; Radoglou, K.; Noïtsakis, B.; Smiris, P.

doi:10.1016/j.foreco.2009.03.048

Cited by 20 publications

(11 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Planting activities will be potentially exposed to a further risk of drought stress endangering plant survival in these sites (Siam et al, 2009). The current-year seedlings especially have high moisture requirements and consequently are highly sensitive to water stress (Engelbrecht et al, 2005;Markesteijn and Poorter, 2009).…”

Section: Introductionmentioning

confidence: 99%

Morphological, anatomical and physiological responses of Campylotropis polyantha (Franch.) Schindl. seedlings to progressive water stress

Bao

2011

Scientia Horticulturae

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Morphological, anatomical and physiological responses of Campylotropis polyantha (Franch.) Schindl. seedlings to progressive water stress

Bao

2011

Scientia Horticulturae

View full text Add to dashboard Cite

“…Seedling establishment is considered as a critical stage in the life cycles of plants (Mediavilla and Escudero 2004;Moles and Westoby 2004;Siam et al 2009), and morphological and physiological responses to drought stress of plants in this stage seem to be crucial for plant survival in these habitats (Zhu 2003;Wei et al 2005;Liu 2009). …”

Section: Introductionmentioning

confidence: 99%

Comparative ecophysiological responses to drought of two shrub and four tree species from karst habitats of southwestern China

Changcheng

Yuguo

Guo

et al. 2010

Trees

View full text Add to dashboard Cite

Drought stress is one of the most important factors in limiting the survival and growth of plants in the harsh karst habitats of southwestern China, especially at the seedling establishment stage. The ecophysiological response to drought stress of native plants with different growth forms is useful for re-vegetation programs. Two shrub and four tree species were studied, including Pyracantha fortuneana (evergreen shrub), Rosa cymosa (deciduous shrub), Cinnamomum bodinieri (evergreen tree), and other three deciduous trees, Broussonetia papyrifera, Platycarya longipes, and Pteroceltis tatarinowii. The seedlings were randomly assigned to four drought treatments, i.e., well-watered, mild drought stress, moderate drought stress, and severe drought stress. Leaf water relations, gas exchange, chlorophyll fluorescence, and growth of the seedlings were investigated. Under severe drought stress, the two shrubs with low leaf area ratio (LAR) maintained higher water status, higher photosynthetic capacity, and larger percent biomass increase than the most of the trees. The two shrubs also had lower specific leaf area, greater intrinsic water use efficiency, and thermal dissipation than the trees. This suggested that the two shrubs had high tolerance to severe drought and were suitable for re-vegetation in harsh habitats. The evergreen C. bodinieri exhibited higher leaf mass ratio (LMR) and LAR than the deciduous species under mild and moderate stress. However, the low maximum quantum efficiency of PSII photochemistry (F v /F m ) and net assimilation rate, and the sharp decreases of water potential, LMR, LAR, and biomass under severe stress indicated C. bodinieri's weak tolerance to severe drought. In response to drought stress, the three deciduous trees revealed sharp reductions of biomass due to the large drought-induced decreases of gas exchange, LAR, and LMR. Under drought conditions, the deciduous trees minimized water loss by stomatal closure and by reducing transpiration leaf area and light harvesting through shedding leaves. This suggested that the three deciduous trees were more sensitive to water availability than the shrubs and used avoidance strategies against drought stress. However, the better growth performance of the deciduous trees than that of the shrubs under favorable conditions suggested that deciduous trees could be suitable for habitats with mild and temporary drought stress.

show abstract

“…It must be remembered that the germination medium may be responsible for providing shade conditions necessary for seedling establishment as well as prevent further development of them (Lüpke 1998;Lockhart et al 2006). The most influential species is Pteridium aquilinum L., given its large presence in the forests under study and their high coverage that prevents the growth of other species, which may promote regeneration by providing a better way to install new seedlings, although at the same time, shade conditions (Lüpke 1998), are not the most suitable for seedling growth (Magnus et al 2006;Siam et al 2009). …”

Section: Phenological Studymentioning

confidence: 99%

“…Many stands have regular seed regeneration (advance regeneration) but the total lack of cultural treatments makes the seedlings die (Siam et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Influence of the canopy in the natural regeneration of Quercus robur in NW Spain

et al. 2014

View full text Add to dashboard Cite

The problem of natural regeneration of forests, in general, is essential especially under the climate change scenario. The canopy influence on the establishment and growth of oak seedlings supposes an approximation to the still lack of knowledge of oak forests heterogeneity. The management directly concerns the radiation that absorbs the canopy and, therefore, to the undergrowth radiation. The aim of the study was to research the existing relationships between the light percentage that crosses the canopy and comes up to the natural regeneration in native stands of Quercus robur L. in Galicia, in NW Spain. After making the stratification of the stands according to their canopy, data collection was based on the percentage of available light in the undergrowth estimated by means of hemispherical photography. The results show that in areas with a better light percentage, there is a greater regeneration density, which is justified by presenting largest development of the vegetation in the partial opening. The most important conclusion is that San Fitoiro forest is the one with better conditions for seedling establishment, because, the percentage of light reaching the understory are the lowest, providing shade conditions turn out to be a clave factor in the germination of acorns and further development of them.

show abstract

Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

Cited by 20 publications

References 46 publications

Morphological, anatomical and physiological responses of Campylotropis polyantha (Franch.) Schindl. seedlings to progressive water stress

Morphological, anatomical and physiological responses of Campylotropis polyantha (Franch.) Schindl. seedlings to progressive water stress

Comparative ecophysiological responses to drought of two shrub and four tree species from karst habitats of southwestern China

Influence of the canopy in the natural regeneration of Quercus robur in NW Spain

Contact Info

Product

Resources

About