Improving the field performance of micro-and minitubers

Struik, P.C.; Lommen, W.J.M.

doi:10.1007/bf02358172

Cited by 31 publications

(30 citation statements)

References 2 publications

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“…For example, to protect a seed potato crop against infection with viruses transmitted by aphids and in order to get the economically optimal tuber-size distribution, the crop can be killed prematurely (Kempenaar and Struik, 2007) or the rate of development can be accelerated by various means (Struik and Wiersema, 1999). The rate of development and the duration of the different crop stages can be manipulated to some extent by the physiological age of the seed tubers and pre-treatment of the seeds (Struik and Wiersema, 1999), by using plastic mulching (Struik and Lommen, 1999) or chemical treatment of the crop (Struik and Wiersema, 1999), and to an even smaller extent by nitrogen supply (Ospina et al, 2014).…”

Section: Definitions Of Potential and Actual Yieldmentioning

confidence: 99%

Yield levels of potato crops: Recent achievements and future prospects

Haverkort

Struik

2015

Field Crops Research

154

117

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Section: Definitions Of Potential and Actual Yieldmentioning

confidence: 99%

Yield levels of potato crops: Recent achievements and future prospects

Haverkort

Struik

2015

Field Crops Research

154

117

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“…For the first group of processes (those determining leaf production), the Monteith model of light interception and radiation use efficiency (Monteith, 1977) was adopted to model total above-ground dry matter production and this model was extended to determine dry matter allocation to harvested organs (e.g., Struik and Lommen, 1999). The total model (1) explained the yield of the desired organs -in our case the leaves -as a function of: − the PARsum, the incident radiation over the total growing period -in our case the PAR, the photosynthetically active part of the global radiation; − the f intercepted PAR , the fraction of the PARsum that was intercepted by the crop (total over the field period); − the radiation use efficiency (RUE), the efficiency by which the intercepted PAR was converted into dry matter; − and the harvest index (HI), or the fraction of the total dry matter produced that was allocated to the useful part of the crop, in our case the leaves.…”

Section: Processes Determining Losses After Formationmentioning

confidence: 99%

Modelling Processes Determining and Limiting the Production of Secondary Metabolites During Crop Growth: The Example of the Antimalarial Artemisinin Produced in Artemisia Annua

Lommen¹,

Bouwmeester²,

Schenk³

et al. 2008

Acta Hortic.

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The quantitative insight in processes underlying yield and concentrations of interesting secondary metabolites in crops is still limited. Yet, this insight is essential to further improve crops and commercial production of target metabolites. Artemisia annua L. (annual or sweet wormwood, Asteraceae) was used to conceptualize a model to describe the processes determining and limiting the production of target metabolites during crop growth. A. annua is an annual herb producing the antimalarial artemisinin, a sesquiterpene lactone with an endoperoxide bridge. Artemisinin is predominantly produced in glandular trichomes present on the leaves and inflorescences. Leaves are the most important organs harvested in commercial production. The accumulation of artemisinin in the crop was analysed as the resultant of the key processes determining leaf dry weight production, accumulation of artemisinin in the leaves and losses after synthesis. A yield formation modelling approach was used to quantify artemisinin yield as a function of the individual processes and to study which processes limited production. Leaf dry weight production was limited by low total dry matter production of the crop because of poor radiation interception during early canopy expansion, and by a high proportion of dry matter allocated to stems that do not contribute to artemisinin production. Production of the target metabolite in the leaves was limited because the total production of artemisinin precursors per unit leaf dry weight was low and because the conversion of precursors to artemisinin was only partial. Possibilities to increase the values of the different yield components are discussed. A new, simple, model for explaining variation in artemisinin yield based on leaf and trichome production in combination with biosynthesis of artemisinin is proposed. INTRODUCTIONInterest in plant secondary metabolites that have a protective or curative effect on human diseases has been renewed. These compounds can be taken in as drugs or as part of food and beverages. Yields and concentrations of target metabolites in crops or crop products are usually low and highly variable over studies. Also within crops, concentrations vary. The causes of these fluctuations are often unknown because commercial production methods are commonly based on applied dose-effect studies with limited attention to the crop physiology behind the effects. A great need exists for more insight into the different processes underlying the accumulation of the secondary metabolites of interest. An improved understanding can lead to more stable yield levels and concentrations, better breeding strategies, more founded selection of production environments, and agronomical and technological innovations in the production chain.To achieve a full and quantitative understanding of accumulation of secondary metabolites is difficult because mechanisms underlying their yields and concentrations in crops are more complex than those underlying yield of plant organs, yield of primary

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“…Despite being less delicate than plantlets and easy to transport and handle, their role in the seed tuber industry and their potential use for evaluation of agronomic characters is still uncertain (Wang and Hu, 1982). Many components affect tuber yield from micro-tubers like tuber size, physiological ISSN : 0974-9411 (Print), 2231-5209 (Online) All Rights Reserved © Applied and Natural Science Foundation www.ansfoundation.org age, green sprouting methods, size grading and crop husbandry techniques (Struik and Lommen, 1999). Among these factors, micro-tuber size is one factor that is the main determinant of yield and is easy to measure (Peterson et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

Effect of cultivars and seed size on field performance of potato micro-tubers in North Eastern Himalayan region in India

Srivastava

Yadav

Diengdoh

et al. 2015

JANS

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The present study was carried out at Central Potato Research Station, Shillong during 2013 and 2014 to assess the growth and yield performance of three grades of in-vitro produced micro-tubers viz. >8 mm, 4-8 mm and <4 mm of two potato (Solanum tuberosum) cultivars namely Kufri Girdhari and Kufri Megha under field planting conditions. The experiment was laid out in a randomised block design with four replications using a common spacing of 50 × 20 cm. The larger grade micro-tubers generally exhibited better physiological growth as well as yield parameters. The larger sized micro-tuber (>8 mm) showed significantly superior plant survival, canopy cover, plant height, number of compound leaves per plant, number of stems per plant and plant vigour followed by 4-8 mm grade and <4 mm grade micro-tubers. Similar trend was observed for all the yield parameters. Among varieties, Kufri Girdhari out performed Kufri Megha in all the growth and yield parameters in all the micro-tuber grades. Thus both micro-tuber size and genotype influenced the field performance. The overall finding indicates that micro-tubers irrespective of the size for both the varieties can produce mini-tubers successfully under direct field conditions in the NEH region which will facilitate quality seed production.

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Improving the field performance of micro-and minitubers

Cited by 31 publications

References 2 publications

Yield levels of potato crops: Recent achievements and future prospects

Yield levels of potato crops: Recent achievements and future prospects

Modelling Processes Determining and Limiting the Production of Secondary Metabolites During Crop Growth: The Example of the Antimalarial Artemisinin Produced in Artemisia Annua

Effect of cultivars and seed size on field performance of potato micro-tubers in North Eastern Himalayan region in India

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