The Effect of Environmental Factors on Growth. Development and Alkaloid Production of Poppy (Papaver somniferum L.)

Bernáth, J.; Tétényi, P.

doi:10.1016/s0015-3796(17)31342-2

Cited by 25 publications

(19 citation statements)

References 3 publications

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“…In most fields, poppy crop growth is spatially highly heterogeneous and requires a substantial amount of data collection to develop models for yield estimation [45]. Several studies have highlighted this phenomenon based on field observation of poppy crops grown under controlled conditions [43,45,[48][49][50]. Few studies have used remote sensing technologies for poppy yield estimation [7,21].…”

Section: Introductionmentioning

confidence: 99%

Poppy Crop Height and Capsule Volume Estimation from a Single UAS Flight

et al. 2017

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Abstract:The objective of this study was to estimate poppy plant height and capsule volume with remote sensing using an Unmanned Aircraft System (UAS). Data were obtained from field measurements and UAS flights over two poppy crops at Cambridge and Cressy in Tasmania. Imagery acquired from the UAS was used to produce dense point clouds using structure from motion (SfM) and multi-view stereopsis (MVS) techniques. Dense point clouds were used to generate a digital surface model (DSM) and orthophoto mosaic. An RGB index was derived from the orthophoto to extract the bare ground spaces. This bare ground space mask was used to filter the points on the ground, and a digital terrain model (DTM) was interpolated from these points. Plant height values were estimated by subtracting the DSM and DTM to generate a Crop Height Model (CHM). UAS-derived plant height (PH) and field measured PH in Cambridge were strongly correlated with R 2 values ranging from 0.93 to 0.97 for Transect 1 and Transect 2, respectively, while at Cressy results from a single flight provided R 2 of 0.97. Therefore, the proposed method can be considered an important step towards crop surface model (CSM) generation from a single UAS flight in situations where a bare ground DTM is unavailable. High correlations were found between UAS-derived PH and poppy capsule volume (CV) at capsule formation stage (R 2 0.74), with relative error of 19.62%. Results illustrate that plant height can be reliably estimated for poppy crops based on a single UAS flight and can be used to predict opium capsule volume at capsule formation stage.

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Section: Introductionmentioning

confidence: 99%

Poppy Crop Height and Capsule Volume Estimation from a Single UAS Flight

et al. 2017

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“…Factors affecting the production of alkaloids per plant can be genetic (Dethier et al 1993;Rao et al 1993), physiological (Schiltz 1975;Tyagi et al 1984;Aerts et al 1991;Fedorov et al 1997) and\or environmental (Gasic et al 1978;Bernath and Tetenyi 1986;Bernath et al 1988) in nature. The aim of this study was to estimate the impact of climatic conditions and type of culture (grassland/cultivated crop) on alkaloid yield.…”

Section: Discussionmentioning

confidence: 99%

Seed yield and components of alkaloid of meadow saffron (Colchicum autumnale) in natural grassland and under cultivation

Girardin¹

2003

Can. J. Plant Sci.

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Poutaraud, A. and Girardin, P. 2003. Seed yield and components of alkaloid of meadow saffron (Colchicum autumnale) in natural grassland and under cultivation. Can. J. Plant Sci. 83: 23-29. Alkaloids extracted from meadow saffron seeds are used in numerous medicines. To test the influence of cultivation and climatic conditions on the production and the quality of meadow saffron seeds, we studied seed alkaloid yield on a natural site (grassland) and in a cultivated crop over several years. Seeds contained in capsules harvested before their dehiscence were dried and ground. The alkaloids of the extracts (colchicoside, demethylcolchicine and colchicine) were analyzed by high-pressure liquid chromatography. Seed alkaloid content was not influenced by year, inter-plant competition, or number of capsules per plant. Seed dry matter yield per plant, however, practically tripled in the cultivated crop due to an increase in the number of capsules per plant compared to the grassland. In the cultivated crop, 47% of fruiting plants produced two new plants (corms) every year. Four years after planting, this vegetative multiplication resulted in intraspecific competition, inducing a decline in seed yield per plant linked to a decrease in the weight of seeds per capsule. We were able to show that cultivated production of meadow saffron greatly increased dry matter and alkaloid yield per plant and per hectare, but that it could lead to the need to thin after several years. Les alcaloïdes extraits des graines de colchiques entrent dans la composition de nombreux médicaments. Afin de tester l'influence de la mise en culture et des conditions climatiques sur la production de graines de colchique, nous avons étudié les composantes du rendement en alcaloïdes en prairie et en culture durant plusieurs années. Les graines contenues dans les capsules récoltées avant leur déhiscence ont été séchées, broyées. Les alcaloïdes extraits ont été analysés en chromatographie en phase liquide. Les teneurs en alcaloïdes n'ont été influencées ni par l'année de culture, ni par la concurrence entre plantes (inter ou intraspécifique), ni par le nombre de capsules par plante. Par contre, le rendement en graines sèches par plante a pratiquement triplé à cause de la levée de la concurrence interspécifique (prairie), essentiellement du fait d'une augmentation du nombre de capsules par plante. En culture, 47 % des plantes fructifères se sont dédoublées chaque année. A partir de la 4 ème année de culture, cette multiplication a entraîné une concurrence intraspécifique provoquant une baisse de rendement en graines par plante liée essentiellement à une diminution du poids de graines par capsule. Ainsi, nous avons pu montrer que la mise en culture des colchiques augmentait de façon importante le rendement en matière sèche par plante et par hectare mais pouvait nécessiter un démariage après plusieurs années.

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“…The change in the accumulation and composition of secondary metabolites in response to stress factors has been considered as an adaptive strategy leading to tolerance. For instance, the enhanced synthesis of saponins in Panax ginseng [22], serotonin in cold-exposed Datura flowers, and enhanced lignification of cell walls in many plant species are the examples of stress-induced accumulation of secondary metabolites [43][44][45].…”

Section: Production Of Secondary Metabolites In Plants Under Abiotic mentioning

confidence: 99%

“…While high temperatures induce premature leaf senescence and reduce membrane integrity, the rate of photosynthesis and biomass production in plants and low temperature leads to osmotic injury, desiccation, oxidative stresses, etc. [27,38,39,41,43]. In order to maximize their temperature tolerance, plant species adjust the metabolism to either increase or decrease the secondary metabolites.…”

Section: Influence Of Temperature Stress On Secondary Metabolitesmentioning

confidence: 99%