Interspecific variation in the response of growth, crown morphology, and survivorship to light of six tree species in the conifer belt of the Bhutan Himalayas

Gratzer, Georg; Darabant, András; Chhetri, Purna B; Bahadur, P.; Eckmüllner, Otto

doi:10.1139/x03-281

Cited by 45 publications

(47 citation statements)

References 53 publications

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“…However, the increases in height and stem diameter were not proportional (Table 3), thus the acclimated seedlings of C. pachystachya had a lower H/D ratio, as also verified in C. speciosa in this study, and in other species by Gratzer et al (2004). A high H/D ratio resulting from the development of plants in shady spots can result in etiolated seedlings that are likely to have problems in sustaining their aerial part after planting at field (Pacheco et al 2013).…”

Section: Discussionsupporting

confidence: 70%

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

et al. 2015

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The recomposition of deforested environments demands the acclimation of seedlings in nurseries. This process induces changes in physiological, anatomical, and morphological traits of plants, favouring their establishment after transplantation to the field. The present study aimed to verify the influence of full sunlight acclimation on seedling hardiness. For the purpose, leaf gas-exchange, plant anatomical and morphological parameters of three tree species [Ceiba speciosa (A. St.-Hil.) Ravenna (Malvaceae), Croton floribundus Spreng. (Euphorbiaceae), and Cecropia pachystachya Trecul (Urticaceae)], which are used for reforestation in the Brazilian Atlantic Biome, were evaluated. Seedlings were grown under 40% of total PPFD (shaded control) and under full sun (acclimated) for 168 days. The acclimation process induced a higher leaf production rate in C. speciosa and C. floribundus, whereas C. pachystachya seedlings replaced their leaves quickly, irrespective of the light conditions. The newly developed leaves of all three species presented a lower area and thicker palisade parenchyma, resulting in a reduced specific leaf area. The seedlings of C. speciosa and C. pachystachya showed increases in light-saturated net photosynthesis and transpiration rates, whereas water-use efficiency generally remained unchanged in all three species. The full sun acclimated seedlings of C. pachystachya showed a reduced relative growth rate, lower height/stem diameter (H/D) and shoot to root dry mass ratios, characteristics that may result in greater physical resistance and ability for water and nutrient uptake to support the higher transpiratory demand under full sun. The reduction of H/D ratio also occurred in the acclimated seedlings of C. speciosa. The seedlings of C. floribundus showed few changes during acclimation, but they did not seem to be affected by excessive light. In spite of the observed differences among the three species, all of them developed hardiness characteristics, mainly related to leaf anatomy, which should favour their establishment after transplantation to the field.Additional key words: ecological anatomy, environmental restoration, mesophyll, plant ecophysiology.

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Section: Discussionsupporting

confidence: 70%

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

et al. 2015

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“…However, similar differences in LMA and A max were found between both species when comparing adult trees (Gil et al 1999). Studies of plant architecture and biomass allocation are needed to confirm the different capacity of both species to take advantage of light availability suggested here (Sipe and Bazzaz 1994;Delagrange et al 2004;Gratzer et al 2004).…”

Section: Discussionmentioning

confidence: 93%

Acclimation to light in seedlings of Quercus petraea (Mattuschka) Liebl. and Quercus pyrenaica Willd. planted along a forest-edge gradient

Rodríguez‐Calcerrada

Pardos

Gil

et al. 2006

Trees

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Photosynthetic acclimation of two co-occurring deciduous oaks (Quercus petraea and Quercus pyrenaica) to a natural light gradient was studied during one growing season. In the spring of 2003, 90 seedlings per species were planted along a transect resulting from a dense Pinus sylvestris stand, an adjacent thinned area and a 10-mwide firebreak (16.5-60.9% Global Site Factor (GSF)). In two dates of the following summer, we measured leaf gas exchange, carboxylation efficiency (CE), chlorophyll and nitrogen content, light-response curves of chlorophyll a fluorescence parameters, and leaf mass per area (LMA). Summer was mild, as evidenced by leaf predawn water potential ( pd ), which reduced the interactive effect of water stress on the response of seedlings to light. Q. pyrenaica had higher LMA, CE, stomatal conductance (g s max ) and photosynthesis per unit area (A a max ) than Q. petraea at all growth irradiances. A a max , LMA, g s max and electron transport rate (ETR) all increased with light availability (GSF) in a similar fashion in both species. Light had also a clear effect on the organization of Photosystem II (PS II), as deduced by chlorophyll a fluorescence curves. Chlorophyll concentration (Chl m ) deCommunicated by U. Lüttge creased with increasing light availability in Q. pyrenaica but it did not in Q. petraea. Seedlings of Q. petraea acclimated to higher irradiances showed a greater non-photochemical quenching (NPQ) than those of Q. pyrenaica. This suggests a higher susceptibility to high light in Q. petraea, which would be consistent with a better adaptation to shade, inferred from the lower LMA or the lower rate of photosynthesis.

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“…Seedling height of a generative origin has been well studied [50][51][52], but for sprouts of vegetative origin, there are fewer studies.…”

Section: Height Of New Sproutsmentioning

confidence: 99%

Development of Sessile Oak and European Hornbeam Sprouts after Thinning

Adamec

Kadavý

Fedorová

et al. 2017

Forests

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Abstract:We observed the growth of juvenile sprouts at stool level in an oak-hornbeam selective coppice after selective thinning. We tested the relations of sprouting probability, number and height of new sprouts, and stool biometric characteristics with thinning intensity and light conditions. We compared the results between the two species. The sprouting probability, number of new sprouts, and height of new sprouts were modelled using different types of regression (logistic, generalized linear, and multiple linear regression) evaluated from 84 sessile oak (Quercus petraea Matt. Liebl.) and 139 European hornbeam (Carpinus betulus L.) stools with the same site conditions. There were no significant relations between sprouting probability and the tested parameters because nearly all stools re-sprouted. The growth (number and height) of new sprouts depended on the stool basal area before thinning and on thinning intensity. Light conditions (indirect site factor) only influenced the number of new European hornbeam sprouts in 2016 and the height of new sessile oak sprouts. The number of new sprouts in European hornbeam was higher than in sessile oak.

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Interspecific variation in the response of growth, crown morphology, and survivorship to light of six tree species in the conifer belt of the Bhutan Himalayas

Cited by 45 publications

References 53 publications

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

Acclimation to light in seedlings of Quercus petraea (Mattuschka) Liebl. and Quercus pyrenaica Willd. planted along a forest-edge gradient

Development of Sessile Oak and European Hornbeam Sprouts after Thinning

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