Relation between specific gravity, starch and nitrogen content of potato tubers

Verma, Shalini; Sharma, T. R.; Joshi, Kuhu

doi:10.1007/bf02361783

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…Specific gravity was obtained by dividing the weight of the tuber in water by the difference between the weight in air and the weight in water. Starch content (g kg −1 ) was calculated according to Verma et al 28 on the basis of the following equation: …”

Section: Methodsmentioning

confidence: 99%

Anthracene–BODIPY Cassettes: Syntheses and Energy Transfer

Wan

Burghart

Chen

et al. 2003

Chemistry A European J

276

201

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Compounds based on the 4,4-difluoro-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY) framework are excellent fluorescent markers. When BODIPY dyes of this type are conjugated to functionalities that absorb at relatively short wavelengths, those functionalities can, in some molecules, transmit the absorbed energy to the BODIPY which then fluoresces. In such cases the BODIPY fragment acts as an acceptor while the other group serves as a donor. Energy transfer efficiencies in such donor-acceptor cassette systems must vary with the relative orientation of the two components, and with the structure of the linkers that attach them. This study was designed to probe these issues for the special case in which the linkers between the donor and acceptor fragments are conjugated. To do this, the cassettes 3-10 were prepared. Electrochemical studies were performed to provide insight into the degree of donor-acceptor conjugation in these systems. X-ray Crystallographic studies on single crystals of compounds 7 and 9 revealed the favored conformations of the donor and acceptor fragments in the solid state. Absorption, fluorescence, and time-resolved fluorescence spectra of the compounds were recorded, and quantum yields for the cassettes excited at the donor lambda(max) were measured. Fluorescence steady-state anisotropy data were determined for cassettes 3 and 9 to provide information about the mutual direction of the transition dipole moments.

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Section: Methodsmentioning

confidence: 99%

Anthracene–BODIPY Cassettes: Syntheses and Energy Transfer

Wan

Burghart

Chen

et al. 2003

Chemistry A European J

276

201

View full text Add to dashboard Cite

show abstract

“…Because potato germplasm cannot be stored as seeds and due to its polyploidy and very complex genetic inheritance, potato starch bioengineering can be considered complicated. Starch is the major storage compound in potato tubers, ranging from 10% to 25% of its fresh weight . For industrial applications, tuber starch content (TSC) and starch yield (SY), i.e., starch produced per unit area, are considered the most important production parameters.…”

Section: Introductionmentioning

confidence: 99%

Improving Starch‐Related Traits in Potato Crops: Achievements and Future Challenges

et al. 2018

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Potato is one of the most important starch crops in the world and is used as a staple food for more than one billion people worldwide. Starch is the main storage compound in potato tubers and is of considerable value in food and non-food applications. The starch biosynthesis pathway is the principal biochemical pathway in plants. Potato starch bioengineering can be considered complicated and has been an extensive subject of study over the past three decades. Tetraploid inheritance is the most conspicuous feature linked with potato breeding. Genetic map construction and linkage mapping have contributed greatly to potato breeding, and association studies have further enhanced our knowledge to carry out optimized and comprehensive breeding programes. This review begins with the introduction of the starch structure with respect to functionality, the starch biosynthesis pathway and related genes/enzymes participating in the pathway. Then, the advances that have been made during the past years in the study of genetic basis of starchrelated traits by linkage and association mapping are summarized. Molecular breeding via transgenic engineering of starch biosynthesis-related genes to modify starch properties is also reviewed. Finally, future challenges and new directions for improving starch quality in potato and the implication of new genome editing tools to produce the next generation starches are proposed. A better understanding of these factors is necessary to conduct molecular breeding programes in potato to improve starch quality.

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“…The latter characters not only influence tuber bruising but are also involved in other tuber traits like tuber shape, starch and sugar content of tubers, and tuber yield [ 26 , 27 ]. Starch accounts for 10-25% of the tuber fresh weight and is the major storage compound of potato tubers [ 28 ]. The amount and steric properties of starch granules influence tuber starch content, which correlates with specific gravity [ 29 ] and thereby affect cellular stability and tuber bruising.…”

Section: Introductionmentioning

confidence: 99%

Association genetics in Solanum tuberosum provides new insights into potato tuber bruising and enzymatic tissue discoloration

et al. 2011

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BackgroundMost agronomic plant traits result from complex molecular networks involving multiple genes and from environmental factors. One such trait is the enzymatic discoloration of fruit and tuber tissues initiated by mechanical impact (bruising). Tuber susceptibility to bruising is a complex trait of the cultivated potato (Solanum tuberosum) that is crucial for crop quality. As phenotypic evaluation of bruising is cumbersome, the application of diagnostic molecular markers would empower the selection of low bruising potato varieties. The genetic factors and molecular networks underlying enzymatic tissue discoloration are sparsely known. Hitherto there is no association study dealing with tuber bruising and diagnostic markers for enzymatic discoloration are rare.ResultsThe natural genetic diversity for bruising susceptibility was evaluated in elite middle European potato germplasm in order to elucidate its molecular basis. Association genetics using a candidate gene approach identified allelic variants in genes that function in tuber bruising and enzymatic browning. Two hundred and five tetraploid potato varieties and breeding clones related by descent were evaluated for two years in six environments for tuber bruising susceptibility, specific gravity, yield, shape and plant maturity. Correlations were found between different traits. In total 362 polymorphic DNA fragments, derived from 33 candidate genes and 29 SSR loci, were scored in the population and tested for association with the traits using a mixed model approach, which takes into account population structure and kinship. Twenty one highly significant (p < 0.001) and robust marker-trait associations were identified.ConclusionsThe observed trait correlations and associated marker fragments provide new insight in the molecular basis of bruising susceptibility and its natural variation. The markers diagnostic for increased or decreased bruising susceptibility will facilitate the combination of superior alleles in breeding programs. In addition, this study presents novel candidates that might control enzymatic tissue discoloration and tuber bruising. Their validation and characterization will increase the knowledge about the underlying biological processes.

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Relation between specific gravity, starch and nitrogen content of potato tubers

Cited by 9 publications

References 6 publications

Anthracene–BODIPY Cassettes: Syntheses and Energy Transfer

Anthracene–BODIPY Cassettes: Syntheses and Energy Transfer

Improving Starch‐Related Traits in Potato Crops: Achievements and Future Challenges

Association genetics in Solanum tuberosum provides new insights into potato tuber bruising and enzymatic tissue discoloration

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