Highly efficient uptake of phosphorus in epiphytic bromeliads

Winkler, U.; Zotz, Gerhard

doi:10.1093/aob/mcn231

Cited by 67 publications

(74 citation statements)

References 29 publications

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“…Efficient uptake of N and P has been demonstrated for vascular epiphytes (Inselsbacher et al, 2007;Winkler & Zotz, 2009) and other higher plant species (Matzek & Vitousek, 2009;Ostertag, 2010). In a range of epiphytic bromeliads, the largest fraction of newly acquired P was not used in metabolism, but stored in the form of phytin (Winkler & Zotz, 2009).…”

Section: New Phytologistmentioning

confidence: 99%

Are vascular epiphytes nitrogen or phosphorus limited? A study of plant 15N fractionation and foliar N : P stoichiometry with the tank bromeliad Vriesea sanguinolenta

Wanek

Zotz

2011

New Phytologist

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Summary• Although there is unambiguous evidence for vascular epiphytic plants to be limited by insufficient water and nutrient supply under natural conditions, it is an open debate whether they are primarily phosphorus (P) or nitrogen (N) limited.• Plant 15 N fractionation and foliar N : P stoichiometry of a tank epiphyte (Vriesea sanguinolenta), and its response to combined N-P fertilization, were studied under semi-natural conditions over 334 d to clarify the type of nutrient limitation.• Plants collected in the field and experimental plants with limited nutrient supply showed significant plant 15 N fractionation (mean 5‰) and plant N : P ratios of c.13.5. Higher relative growth rates and declines in plant 15 N fractionation (0.5‰) and in foliar N : P ratios to 8.5 in the high N-P treatment indicated that these epiphytes were P limited in situ. The critical foliar N : P ratio was 10.4, as derived from the breakpoint in the relationship between plant 15 N fractionation and foliar N : P.• We interpret the widespread 15 N depletion of vascular epiphytes relative to their host trees as deriving from 15 N fractionation of epiphytes as a result of P limitation.High foliar N : P ratios (> 12) corroborate widespread P limitation (or co-limitation by N and P) of epiphytic bromeliads and, possibly, other epiphyte species.

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Section: New Phytologistmentioning

confidence: 99%

Are vascular epiphytes nitrogen or phosphorus limited? A study of plant 15N fractionation and foliar N : P stoichiometry with the tank bromeliad Vriesea sanguinolenta

Wanek

Zotz

2011

New Phytologist

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“…However, high concentrations of N do not increase the biological responses and may, therefore, be attributed to "luxury consumption" since epiphytic species in their natural environment are generally exposed to low concentrations of nutrients (ZOTZ and ASSHOFF, 2010). Nutrient uptake capacities by bromeliads are normally tuned towards the capture of short pulses, though nutrients not needed for current metabolism, and such as a combination of high uptake of nutrient and slow growth, frequently leads to an accumulation of reserves (BENZING, 1973;BENZING and RENFROW, 1974;WINKLER and ZOTZ, 2009). …”

Section: Resultsmentioning

confidence: 99%

Gas exchange and chlorophyll a fluorescence parameters of ornamental bromeliads

Silva

Ferreira

et al. 2017

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Gas exchange and chlorophyll a fluorescence are widely used in physiological and ecological studies; however, few studies have used these techniques with ornamental plants. This study tested the potential contribution of gas exchange and chlorophyll a fluorescence to evaluate the water and nutrients uptake by the tank and root system of epiphyte bromeliad Guzmania lingulata. For this purpose, we conducted an experiment with different water regime and another with different concentrations of nitrogen. The experiments were: 1 -Watering: Control (application of water into Tank and Root), Tank (watering into Tank), Root (watering Root) and Drought (water suspension during the 90 days of experimentation) and 2 -Nitrogen: Plants fertilized with Hoagland and Arnon nutrient solution exclusively into Tank or Root with nitrogen concentrations of control and 2.62 or 5.34 mM N applied as urea. The F v /F m ratio allowed comparing the treatments between experiments, demonstrating that Root and Tank both have the capacity to maintain G. lingulata photosynthetic activity and growth, while Drought treatment (water suspension) was the limiting factor for energy conversion efficiency of PSII. However, gas exchange was more permissive as a parameter for comparing treatments in the nitrogen experiment, providing important information about the general aspects of the photosynthetic process in the watering experiment. Both gas exchange and chlorophyll a fluorescence can support the evaluation of G. lingulata physiological status and can be useful tools in ornamental horticultural studies. Keywords: Bromeliaceae, nutrition, drought stress, IRGA, fluorometer. RESUMOTrocas gasosas e fluorescência da clorofila a de bromélias ornamentais Os parâmetros de trocas gasosas e fluorescência da clorofila a são amplamente utilizados em estudos fisiológicos e ecológicos, no entanto essas técnicas tem tido pouco destaque em estudos com plantas ornamentais. Neste estudo, foi testado o potencial de contribuição dessas técnicas para avaliação da absorção de água e nutrientes pelo tanque e sistema radicular da bromélia epífita Guzmania lingulata. Para tanto foram desenvolvidos experimentos com diferentes regimes hídricos e diferentes concentrações de nitrogênio. Os experimentos foram: 1 -Irrigação: Controle (aplicação de água no Tanque e Raiz), Tanque (regas no Tanque), Raiz (regas no substrato), Seca (suspensão hídrica durante os 90 dias de experimento) e o segundo as plantas foram submetidas a adubação com solução nutritiva de Hoagland and Arnon exclusivas no Tanque ou na Raiz nas concentrações de nitrogênio de 0.00, 2.62 ou 5.34 mM N aplicadas na forma de ureia. Nos dois experimentos a razão F v /F m foi eficiente para comparação dos tratamentos, demonstrando que tanto a raiz como o tanque apresentam a capacidade de manter a atividade fotossintética e o crescimento de G. lingulata, sendo que o maior limitante para a eficiência de conversão de energia do PSII é a suspensão hídrica. Os parâmetros de trocas gasosas foram mais eficientes no expe...

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“…More than 94% of the isolates showed the ability of phosphate solubilization (Table 1). This characteristic is particularly important in microhabitats where a low and irregular supply of nutrients demands an effective uptake mechanism (Winkler & Zotz 2009). The only four bacteria that lack this trait were isolated from the phyllosphere and the water tank of Vriesea.…”

Section: Resultsmentioning

confidence: 99%

Characterization of plant growth-promoting bacteria inhabiting Vriesea gigantea Gaud. and Tillandsia aeranthos (Loiseleur) L.B. Smith (Bromeliaceae)

et al. 2013

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Abstract:Microorganisms that live inside and around a plant can supply it with essential substances, such as phytohormones and essential nutrients. The present investigation aimed to isolate and characterize the phyllosphere, the endophytic, and the water tank bacteria associated with Vriesea gigantea and Tillandsia aeranthos . The bacteria were tested for siderophore and indole-3-acetic acid (IAA) production, phosphate solubilization, and presence of the nif H gene. Genetic diversity of the bacterial isolates was evaluated by rep-PCR. Sixty-eight bacterial strains were isolated from 3 different microhabitats of V. gigantea and from 2 microhabitats of T. aeranthos bromeliad plants. Gram-positive, spore-forming bacilli comprised most bacterial isolates. All isolates produced IAA in vitro in presence of very low amounts of tryptophan. More than 70% of the evaluated bacteria presented the ability of siderophore production and phosphate solubilization, and possessed the nif H gene. It was not possible to distinguish well-defined groups of isolates based on the bromeliad species and microhabitat they inhabit using genetic characterization by rep-PCR. Water tanks presented the most abundant diversity compared with phyllosphere and endophytes, probably due to the high nutrient concentration, which promotes an ideal environment for complex microbial communities. Keywords: bromeliads, PGPB, diazotrophic bacteria, water tank, siderophore, IAA. Neotrop., vol. 13, no. 3 our knowledge, none study has described or selected PGPB or other bacteria associated to these two species of bromeliads. For this reason, the aims of the present investigation were to isolate and characterize the phyllosphere, endophytic, and water tank bacteria associated with individuals of V. gigantea and T. aeranthos collected in southern Brazil. Those two species were chosen due to the morphological differences in the water uptake method: a water tank in V. gigantea and trichomes in T. aeranthos.

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Highly efficient uptake of phosphorus in epiphytic bromeliads

Cited by 67 publications

References 29 publications

Are vascular epiphytes nitrogen or phosphorus limited? A study of plant 15N fractionation and foliar N : P stoichiometry with the tank bromeliad Vriesea sanguinolenta

Are vascular epiphytes nitrogen or phosphorus limited? A study of plant 15N fractionation and foliar N : P stoichiometry with the tank bromeliad Vriesea sanguinolenta

Gas exchange and chlorophyll a fluorescence parameters of ornamental bromeliads

Characterization of plant growth-promoting bacteria inhabiting Vriesea gigantea Gaud. and Tillandsia aeranthos (Loiseleur) L.B. Smith (Bromeliaceae)

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