Abstract
BACKGROUND AND AIMS: -CAM], and may present an epiphytic habit. The more derived features related to these traits are described for the Tillandsioideae subfamily. In this context, the aims of this study were to evaluate how terrestrial predators contribute to the nutrition and performance of bromeliad species, subfamilies and ecophysiological types, whether these species differ in their ecophysiological traits and whether the physiological outcomes are consistent among subfamilies and types (e.g. presence/absence of tank, soil/tank/atmosphere source of nutrients, trichomes/roots access to nutrients). METHODS: N-enriched predator faeces) and physiological methods (analyses of plant protein, amino acids, growth, leaf mass per area and total N incorporated) in greenhouse experiments were used to investigate the ecophysiological contrasts between Tillandsioideae and Bromelioideae, and among ecophysiological types when a predatory anuran contributes to their nutrition. KEY RESULTS: It was observed that Bromelioideae had higher concentrations of soluble protein and only one species grew more (Ananas bracteatus), while Tillandsioideae showed higher concentrations of total amino acids, asparagine and did not grow. The ecophysiological types that showed similar protein contents also had similar growth. Additionally, an ordination analysis showed that the subfamilies and ecophysiological types were discrepant considering the results of the total nitrogen incorporated from predators, soluble protein and asparagine concentrations, relative growth rate and leaf mass per area. CONCLUSIONS: Bromeliad subfamilies showed a trade-off between two strategies: Tillandsioideae stored nitrogen into amino acids possibly for transamination reactions during nutritional stress and did not grow, whereas Bromelioideae used nitrogen for soluble protein production for immediate utilization, possibly for fast growth. These results highlight that Bromeliaceae evolution may be directly associated with the ability to stock nutrients.
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Claims 8
Claim · model-written summary
Bromelioideae had higher soluble protein concentrations.
- Taxon
- BromelioideaeBromelioideaee0
- Outcome
- concentrations of soluble proteine0
- Direction
- highere0
Verbatim
e0“Bromelioideae had higher concentrations of soluble protein”
Claim · model-written summary
Ananas bracteatus was the one species with greater growth.
Verbatim
e0“only one species grew more (Ananas bracteatus)”
Claim · model-written summary
Tillandsioideae had higher total amino acid and asparagine concentrations.
- Taxon
- TillandsioideaeTillandsioideaee0
- Outcome
- concentrations of total amino acids, asparaginee0
- Direction
- highere0
Verbatim
e0“Tillandsioideae showed higher concentrations of total amino acids, asparagine”
Claim · model-written summary
Tillandsioideae did not grow.
- Taxon
- TillandsioideaeTillandsioideaee0
- Outcome
- did not growe0
Not reportedDirection
Verbatim
e0“Tillandsioideae showed higher concentrations of total amino acids, asparagine and did not grow”
Claim · model-written summary
Ecophysiological types with similar protein contents had similar growth.
- Taxon
- ecophysiological typese0
- Outcome
- similar growthe0
- Direction
- similare0
- Qualifier
- similar protein contentse0
- Comparator
- ecophysiological typese0
Not reportedCompoundOrgan / stageSetting
Verbatim
e0“The ecophysiological types that showed similar protein contents also had similar growth”
Claim · model-written summary
Ordination distinguished subfamilies and ecophysiological types across nitrogen incorporation, protein, asparagine, growth and leaf mass per area.
- Taxon
- subfamilies and ecophysiological typese0
- Outcome
- were discrepante0
- Qualifier
- total nitrogen incorporated from predators, soluble protein and asparagine concentrations, relative growth rate and leaf mass per areae0
Not reportedDirection
Verbatim
e0“the subfamilies and ecophysiological types were discrepant considering the results of the total nitrogen incorporated from predators, soluble protein and asparagine concentrations, relative growth rate and leaf mass per area”
Claim · model-written summary
The authors interpret Tillandsioideae as storing nitrogen in amino acids during nutritional stress.
- Taxon
- TillandsioideaeTillandsioideaee0
- Outcome
- stored nitrogen into amino acidse0
- Qualifier
- possibly for transamination reactions during nutritional stresse0
Verbatim
e0“Tillandsioideae stored nitrogen into amino acids possibly for transamination reactions during nutritional stress”
Claim · model-written summary
The authors interpret Bromelioideae as using nitrogen for soluble protein production and potentially rapid growth.
- Taxon
- BromelioideaeBromelioideaee0
- Outcome
- soluble protein productione0
- Qualifier
- possibly for fast growthe0
Verbatim
e0“Bromelioideae used nitrogen for soluble protein production for immediate utilization, possibly for fast growth”