Relative growth rate in phylogenetically related deciduous and evergreen woody species

Antúnez, Isabel; Retamosa, E. C.; Villar, Rafael

doi:10.1007/s004420100645

Cited by 152 publications

(155 citation statements)

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“…In our study, provenances showed no statistically significant variation in the RGR. The variation in RGR in woody species is generally assumed to be related to the variation in leaf area ratio (LAR) and to be greater in deciduous species compared to evergreens (Antunez et al, 2001). Physiological mechanisms (Walter et In the present study, there were significant differences among provenances in seed germination percentage, varying from 26.6% to 91.2% (Fig.…”

Section: Discussionmentioning

confidence: 52%

Variation in Seed and Seedling Traits among Fifteen Chinese Provenances of Magnolia officinalis

Xiao

Yang

2012

Not Bot Hort Agrobot Cluj

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Magnolia officinalis seeds were collected from 15 different provenances, ranging from 336 to 1387 m in China. The main objective of this study was to identify germplasm resources of M. officinalis by test seed traits, seed germination, seedling traits, and seedling growth rate. There are significant differences among provenances in all studied attributes except relative growth rate and the net assimilation rate. Seed weight exhibited maximum variation among provenances in seed morphometric traits with a significant positive correlation in terms of average annual temperature and average annual rainfall, and negative correlation with latitude of seed origin. Overall average seed germination in nursery was 59.4% varying from 26.6% to 91.2%. Seedling height decreased by geographical latitude gradually from south to north, while stem diameter declines from east to west. That means the geographic variation of the plant at the seedling stage manifests a two-way variation with the latitude and longitude. Seed of Longsheng, Yangxian, Jingning, Wuyishan, Kaixian and Ningqiang provenance have been identified suitable to produce quality seedlings. It can be concluded that the observed patterns of variation will have implications for genetic resources conservation and tree improvement.

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Section: Discussionmentioning

confidence: 52%

Variation in Seed and Seedling Traits among Fifteen Chinese Provenances of Magnolia officinalis

Xiao

Yang

2012

Not Bot Hort Agrobot Cluj

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“…Desta maneira, existe correlação entre crescimento e taxa de expansão da AF e as espécies com alta AFE e alta TCR, aparentemente produzem folhas com baixo investimento em biomassa. Portanto, segundo Antúnez et al (2001), as diferenças na AFE entre espécies se associam ao espessamento foliar determinado pelo genótipo. Wang et al (1994) indicam que as alterações nos parâmetros relacionados à morfologia foliar, como RAF, RMF e AFE, observados com o aumento da idade das plantas, revelam a capacidade de adaptação das folhas às condições variáveis da radiação ao longo do crescimento e desenvolvimento da planta.…”

Section: Resultsunclassified

“…Por tal motivo, o incremento da AF é uma medida estratégica para maximizar a superfície da folha, refletindo a área disponível para a absorção de luz por unidade de fotoassimilado investido (Marañon & Grubb 1993). Dessa forma, e concordando com Antúnez et al (2001), a maior TCR de M. peruiferum, pode ser explicada pelo incremento da AF, evidenciado pelas variações na RAF (figura 1B) e na AFE (figura 1C) entre 7 e 10 meses de idade, já que esta espécie não apresentou incremento na RMF nesse mesmo período, embora a RMF tenha sido alta nas duas idades (figura 1D). Segundo Grotkopp & Rejmánek (2007), uma alta AFE permite maior eficiência na captura da energia solar e é a partir da fotossíntese, em condições nutricionais ótimas, que a capacidade competitiva se evidencia.…”

Section: Resultsunclassified

“…Segundo Antúnez et al (2001), as espécies arbóreas decíduas apresentam maiores TCR, AFE e A que as espécies sempre-verdes. Estes mesmos autores observaram que a maior TCR em espécies decíduas pode estar determinada pela maior RAF, que por sua vez é estimada pela maior AFE, e que outras características, como RMF e TAL avaliam em menor escala a variação da TCR.…”

Section: Resultsunclassified

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Crescimento, eficiência fotossintética e eficiência do uso da água em quatro espécies de leguminosas arbóreas tropicais

Pinzón-Torres

Schiavinato

2008

Hoehnea

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-(Growth, photosynthetic and water use efficiency in four tropical tree legume species of). The series of studies covering variables of growth and photosynthetic parameters helps to clarify the relationship between individuals of a plant community. The objective of this study was to evaluate the growth, photosynthetic and water use efficiency in four legume trees in a period of three months under conditions of a greenhouse. It was observed that Myroxylon peruiferum showed higher values for the rate of relative growth, the ratio of leaf area and the mass leaf and greater leaf specific area, compared with the other three species. But, this species did not presente the highest photosynthetic rate, as consequence of increased investment in leaf area. All species, except Lonchocarpus muehlbergianus showed the same efficiency in the use of water. Although M. peruiferum does not fix atmospheric nitrogen through symbiosis with rhizobia, it seems to be an efficient species to use the nitrogen available in the soil for the production of biomass. Key words: Centrolobium tomentosum, Inga vera, Lonchocarpus muehlbergianus, Myroxylon peruiferumRESUMO -(Crescimento, eficiência fotossintética e eficiência do uso da água em quatro espécies de leguminosas arbóreas tropicais). O conjunto de estudos que abrangem variáveis de crescimento e parâmetros fotossintéticos ajuda a esclarecer as relações entre os indivíduos de uma comunidade vegetal. O objetivo deste trabalho foi avaliar o crescimento, a eficiência fotossintética e a eficiência no uso da água em quatro leguminosas arbóreas, durante três meses, sob condições de casa de vegetação. Foi observado que Myroxylon peruiferum apresentou os maiores valores quanto à taxa de crescimento relativo, razão de área foliar e de massa foliar e maior área foliar específica, quando comparada com as outras três espécies. Porém, não apresentou a maior taxa fotossintética, como consequência do maior investimento em área foliar. Todas as espécies, exceto Lonchocarpus muehlbergianus apresentaram a mesma eficiência do uso da água. Embora M. peruiferum não fixe nitrogênio atmosférico por meio de simbiose com rizóbios, se observou que é uma espécie eficiente para aproveitar o nitrogênio disponível no solo para a produção de biomassa. IntroduçãoNa composição e estrutura das florestas tropicais, as leguminosas apresentam uma alta diversidade de gêneros e espécies (Moreira et al. 1992). Não obstante, estas espécies devem se adaptar morfológica e fisiologicamente às diversas condições ambientais para determinar a sua competitividade dentro da comunidade vegetal.As adaptações morfológicas variam segundo a alocação da biomassa, que pode se manifestar pelo incremento em massa, volume, comprimento ou área das diferentes estruturas da planta, o que é avaliado como crescimento (Gloser & Gloser 1996).Quanto às adaptações fisiológicas, Hall et al. (1993) mencionam que existem quatro fatores relacionados à fotossíntese que influenciam no incremento da biomassa: (i) a quantidade de luz incidente, que é det...

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“…The best equations to fit the relations were chosen by regression procedures with selection of forward, backward and stepwise methods. The relationship between the infection percentages by FOS and MPH and three groups of branch number and seed colour were analysed comparing the slopes of the linear regressions using a covariance analysis (Antunez et al 2001). The purpose of this statistical analysis was to determine the variables that significantly contribute to the variation of resistance to the Fusarium wilt and charcoal rot diseases in the sesame accessions.…”

Section: Methodsmentioning

confidence: 99%

Assessing the suitability of morphological and phenotypical traits to screen sesame accessions for resistance to Fusarium wilt and charcoal rot diseases

El-Bramawy¹,

El-Hendawy²,

Shaban³

2009

Plant Prot. Sci.

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El-Bramawy M. A. E.-H. S., El-Hendawy S. E.-S., Shaban W. I. (2009): Assessing the suitability of morphological and phenotypical traits to screen sesame accessions for resistance to Fusarium wilt and charcoal rot diseases. Plant Protect. Sci., 45: 49-58.Since sesame accessions differ significantly in many morphological and phenotypical traits, some of these traits could be suitable for direct selection for resistance to Fusarium wilt and charcoal rot diseases. Forty-eight sesame accessions that originated from different countries were screened for their reaction to infection by Fusarium oxysporum f.sp. sesami (FOS) and Macrophomina phaseolina (MPH), the Fusarium wilt and charcoal rot pathogens, respectively, in 2005 and 2006. The level of infection and seed yield were measured. Number of branches and days to maturity as morphological traits and seed color as phenotypical trait, which represent some of the diversity among the accessions, were tested for possible correlation with infection percentage. We found that 57, 67 and 67% in 2005, and 77, 77 and 62% in 2006 of the accessions resistant to FOS, and 68, 77 and 64% in 2005, and 80, 76 and 60% in 2006 of the accessions resistant to MPH had a medium branch number, medium maturity and creamy seed colour. According to the analysis of regression, branch number and seed colour were significantly correlated with infection percentages by FOS and/or MPH. Therefore, these traits may be used for direct selection of sesame accessions that are resistant to Fusarium wilt and charcoal rot disease. However, no significant correlations were found between days to maturity and infection percentage by both fungi. Linear regression between infection percentage and three groups of branch number and seed colour indicated that the accessions with medium branch number and creamy or white seed colour were the only covariate which significantly correlated with the infection percentage by FOS and/or MPH.

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Relative growth rate in phylogenetically related deciduous and evergreen woody species

Cited by 152 publications

References 33 publications

Variation in Seed and Seedling Traits among Fifteen Chinese Provenances of Magnolia officinalis

Variation in Seed and Seedling Traits among Fifteen Chinese Provenances of Magnolia officinalis

Crescimento, eficiência fotossintética e eficiência do uso da água em quatro espécies de leguminosas arbóreas tropicais

Assessing the suitability of morphological and phenotypical traits to screen sesame accessions for resistance to Fusarium wilt and charcoal rot diseases

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