Infrared thermography ofArum lily inflorescences

Skubatz, Hanna; Nelson, Timothy A.; Dong, Arthur M.; Meeuse, B. J. D.; Bendich, Arnold J.

doi:10.1007/bf02411396

Cited by 45 publications

(41 citation statements)

References 14 publications

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“…[4][5][6][7] Similarly in A. titanum, we have reported the thermogenic spadix during the female flowering phase. Based on our observations of now six inflorescences, the heat production is determined and begins around 20 h, the temperature maximum of 36-38°C being reached around midnight.…”

supporting

confidence: 54%

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On the thermogenesis of the Titan arum (Amorphophallus titanum)

Korotkova

Barthlott

2009

Plant Signaling & Behavior

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supporting

confidence: 54%

“…Thermogenesis plays an important role in the pollination ecology of Araceae 3,4 and therefore occurs in many genera. [4][5][6][7] Similarly in A. titanum, we have reported the thermogenic spadix during the female flowering phase.…”

mentioning

confidence: 99%

On the thermogenesis of the Titan arum (Amorphophallus titanum)

Korotkova

Barthlott

2009

Plant Signaling & Behavior

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“…The maximum temperature of the male flowers, which characterizes the first thermogenic phase of the Arum inflorescence, sometimes even exceeds that of the appendix (Table 1). Since Skubatz et al, (1990) described a similar phenomenon in ^. italicumandA.…”

Section: Discussionmentioning

confidence: 73%

Dynamics of thermogenesis and structure of epidermal tissues in inflorescences of Arum maculatum

Bermadinger-Stabentheiner

Stabentheiner

1995

New Phytologist

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The temporal dynamics and spatiaJ distribution of heat production by inflorescences of Arum maculatum L. were investigated by infra-red thermography. Two centres of he^t production, tbe appendix and the male flowers, and three tbermogenic phases, two of tbe male flowers and one of tbe appendix, could be obser\ed. On tbe first day of flowering, when the spatbc was still firmly closed, the male flowers became tberniogenic ( = first thfrmogenic phase of tbe inflorescence) and reacbed surface temperatures of 4-l-8

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“…Thermal Image-Processing System A thermographic system previously described was used to obtain surface temperatures of the inflorescence (6). Fifty to 100 images were recorded during the thermogenic response, and images were analyzed only for periods during a change in heat-production pattern.…”

Section: Plant Materialsmentioning

confidence: 99%

“…The oxygen content of air-saturated water was 237 uM. The rate of oxygen consumption was determined with a Clark oxygen electrode after 10 min of incubation in the buffer in the presence of respiratory inhibitors KCN and/or SHAM2 (6).…”

Section: Plant Materialsmentioning

confidence: 99%

Heat Production in the Voodoo Lily (Sauromatum guttatum) as Monitored by Infrared Thermography

Skubatz¹,

Nelson²,

Meeuse³

et al. 1991

Plant Physiol.

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The pattem of surface temperatures of the inflorescence of Sauromatum guttatum was investigated by using an infrared camera. The male flowers are weakly thermogenic on the first day of inflorescence opening (D-day) as well as on the next day (D + 1), reaching 0.5 to 1°C above ambient temperature. The appendix (the upper sterile part of the inflorescence) is highly thermogenic on D-day, reaching 320C, and is faintly thermogenic on D + 1, reaching 1°C above ambient temperature. The lower part of the spadix, close to the female flowers, is also thermogenic on D-day and D + 1, reaching a temperature similar to that of the appendix only on D + 1. Salicylic acid does not induce heat production in the lower part of the spadix, as it does in the appendix. Respiration of tissue slices obtained from the appendix shows that the capacity for cyanide-insensitive respiration is present in young and mature appendices. This altemative respiratory pathway is not, however, utilized in young appendix tissue, but is engaged during the maturation of that tissue. MATERIALS AND METHODS Plant MaterialSauromatum guttatum inflorescences were grown in a growth chamber under 15-h light/9-h dark periods with a photon flux density of 150 ,umol m-2. s-' at 19°C. The developmental stage of S. guttatum was determined retroactively with respect to D-day, the day of inflorescence opening.Thermal Image-Processing System A thermographic system previously described was used to obtain surface temperatures of the inflorescence (6). Fifty to 100 images were recorded during the thermogenic response, and images were analyzed only for periods during a change in heat-production pattern. More than 10 inflorescences were examined.c. 1)The inflorescence ofSauromatum guttatum is a widely used material for the study of heat production in plants. Salicylic acid was recently identified as 'calorigen', the plant hormone that induces heat-production in the inflorescence-appendix of S. guttatum (4). The alternative (cyanide-insensitive) oxidase that is required for plant thermogenicity has been purified from appendix mitochondria (2). The production of two of the proteins associated with the alternative oxidase activity is regulated by salicylic acid in vivo (3).Although much is now known about the alternative oxidase and the levels of salicylic acid in various parts of the Sauromatum inflorescence, a detailed description of heat production by that inflorescence has not yet been reported. We now present an analysis of heat production during anthesis by using infrared thermography. We also sought to determine whether salicylic acid can trigger heat production in thermogenic parts other than the appendix (the male flowers and the lower part of the spadix).

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Infrared thermography ofArum lily inflorescences

Cited by 45 publications

References 14 publications

On the thermogenesis of the Titan arum (Amorphophallus titanum)

On the thermogenesis of the Titan arum (Amorphophallus titanum)

Dynamics of thermogenesis and structure of epidermal tissues in inflorescences of Arum maculatum

Heat Production in the Voodoo Lily (Sauromatum guttatum) as Monitored by Infrared Thermography

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