Feeding on prey increases photosynthetic efficiency in the carnivorous sundew Drosera capensis

Pavlovič, Andrej; Krausko, Miroslav; Libiaková, Michaela; Adamec, Lubomír

doi:10.1093/aob/mct254

Cited by 37 publications

(34 citation statements)

References 70 publications

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“…The digestive fluid is also costly in term of carbon and nitrogen. On the other hand, the benefit in the form of increased uptake of N and P from prey can later stimulate photosynthesis, as has been documented in many carnivorous genera [28], [67], [68], [69], [70]. Thus, the Venus flytrap has evolved several control mechanisms how to optimize benefit from carnivory by reducing its associated costs, if there is nothing too much eat (Fig.…”

Section: Discussionmentioning

confidence: 99%

Abundance of Cysteine Endopeptidase Dionain in Digestive Fluid of Venus Flytrap (Dionaea muscipula Ellis) Is Regulated by Different Stimuli from Prey through Jasmonates

et al. 2014

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The trap of the carnivorous plant Venus flytrap (Dionaea muscipula) catches prey by very rapid closure of its modified leaves. After the rapid closure secures the prey, repeated mechanical stimulation of trigger hairs by struggling prey and the generation of action potentials (APs) result in secretion of digestive fluid. Once the prey's movement stops, the secretion is maintained by chemical stimuli released from digested prey. We investigated the effect of mechanical and chemical stimulation (NH4Cl, KH2PO4, further N(Cl) and P(K) stimulation) on enzyme activities in digestive fluid. Activities of β-D-glucosidases and N-acetyl-β-D-glucosaminidases were not detected. Acid phosphatase activity was higher in N(Cl) stimulated traps while proteolytic activity was higher in both chemically induced traps in comparison to mechanical stimulation. This is in accordance with higher abundance of recently described enzyme cysteine endopeptidase dionain in digestive fluid of chemically induced traps. Mechanical stimulation induced high levels of cis-12-oxophytodienoic acid (cis-OPDA) but jasmonic acid (JA) and its isoleucine conjugate (JA-Ile) accumulated to higher level after chemical stimulation. The concentration of indole-3-acetic acid (IAA), salicylic acid (SA) and abscisic acid (ABA) did not change significantly. The external application of JA bypassed the mechanical and chemical stimulation and induced a high abundance of dionain and proteolytic activity in digestive fluid. These results document the role of jasmonates in regulation of proteolytic activity in response to different stimuli from captured prey. The double trigger mechanism in protein digestion is proposed.

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Section: Discussionmentioning

confidence: 99%

Abundance of Cysteine Endopeptidase Dionain in Digestive Fluid of Venus Flytrap (Dionaea muscipula Ellis) Is Regulated by Different Stimuli from Prey through Jasmonates

et al. 2014

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“…Red coloration has been widely hypothesized as a visual cue used to lure potential prey, by increasing contrast with the background [7][8][9][10]. However, experimental evidence is limited and hampered by methodological issues such as a lack of ecological relevance [5,10] or confounding of attraction and capture mechanisms (for example in [11,12]). As a result, prey attraction to red carnivorous plant traps has not yet been conclusively demonstrated for any species.…”

Section: Introductionmentioning

confidence: 99%

Red trap colour of the carnivorous plant Drosera rotundifolia does not serve a prey attraction or camouflage function

2014

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The traps of many carnivorous plants are red in colour. This has been widely hypothesized to serve a prey attraction function; colour has also been hypothesized to function as camouflage, preventing prey avoidance. We tested these two hypotheses in situ for the carnivorous plant Drosera rotundifolia. We conducted three separate studies: (i) prey attraction to artificial traps to isolate the influence of colour; (ii) prey attraction to artificial traps on artificial backgrounds to control the degree of contrast and (iii) observation of prey capture by D. rotundifolia to determine the effects of colour on prey capture. Prey were not attracted to green traps and were deterred from red traps. There was no evidence that camouflaged traps caught more prey. For D. rotundifolia, there was a relationship between trap colour and prey capture. However, trap colour may be confounded with other leaf traits. Thus, we conclude that for D. rotundifolia, red trap colour does not serve a prey attraction or camouflage function.

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“…On the nutrient-poor, sunny and moist sites of its natural habitat, nutrient gain via insect capture, in particular that of N and phosphorus, allows D. muscipula to successfully compete with 'conventional' plants, which derive mineral nutrients via root uptake (Ellison & Gotelli, 2001;Gibson & Waller, 2009;Pavlovi c et al, 2014;Kruse et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Integration of trap‐ and root‐derived nitrogen nutrition of carnivorous Dionaea muscipula

et al. 2014

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SummaryCarnivorous Dionaea muscipula operates active snap traps for nutrient acquisition from prey; so what is the role of D. muscipula's reduced root system?We studied the capacity for nitrogen (N) acquisition via traps, and its effect on plant allometry; the capacity of roots to absorb NO 3 À , NH 4 + and glutamine from the soil solution; and the fate and interaction of foliar-and root-acquired N. Feeding D. muscipula snap traps with insects had little effect on the root : shoot ratio, but promoted petiole relative to trap growth. Large amounts of NH 4 + and glutamine were absorbed upon root feeding. The high capacity for root N uptake was maintained upon feeding traps with glutamine. High root acquisition of NH 4 + was mediated by 2.5-fold higher expression of the NH 4 + transporter DmAMT1 in the roots compared with the traps. Electrophysiological studies confirmed a high constitutive capacity for NH 4 + uptake by roots. Glutamine feeding of traps inhibited the influx of 15 N from root-absorbed 15 N/ 13 C-glutamine into these traps, but not that of 13 C. Apparently, fed traps turned into carbon sinks that even acquired organic carbon from roots. N acquisition at the whole-plant level is fundamentally different in D. muscipula compared with noncarnivorous species, where foliar N influx down-regulates N uptake by roots.

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Feeding on prey increases photosynthetic efficiency in the carnivorous sundew Drosera capensis

Cited by 37 publications

References 70 publications

Abundance of Cysteine Endopeptidase Dionain in Digestive Fluid of Venus Flytrap (Dionaea muscipula Ellis) Is Regulated by Different Stimuli from Prey through Jasmonates

Abundance of Cysteine Endopeptidase Dionain in Digestive Fluid of Venus Flytrap (Dionaea muscipula Ellis) Is Regulated by Different Stimuli from Prey through Jasmonates

Red trap colour of the carnivorous plant Drosera rotundifolia does not serve a prey attraction or camouflage function

Integration of trap‐ and root‐derived nitrogen nutrition of carnivorous Dionaea muscipula

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