Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Expression of male sterility in alloplasmic Brassica juncea with Erucastrum canariense cytoplasm and the development of a fertility restoration system (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 120 (2001), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An alloplasmic mustard, Brassica juncea, has been synthesized by placing its nucleus into the cytoplasm of the related wild species Erucastrum canariense to express cytoplasmic male sterility. To achieve this, the sexual hybrid E. canariense (2n=18, EcEc) ×Brassica campestris (2n= 20, AA) was repeatedly backcrossed to B. juncea (2n= 36, AABB). Cytoplasmic male-sterile (CMS) plants were recovered in the BC4 generation. These plants are a normal green and the flowers have slender, non-dehiscing anthers that contain sterile pollen. Nectaries are well developed and female fertility is 〉 90%. The fertility restoration gene was introgressed to CMS B. juncea from the cytoplasmic donor E. canariense through pairing between chromosomes belonging to B. juncea with those of the E. canariense genome. The restorer plants have normal flowers, with well-developed anthers containing fertile pollen. Meiosis proceeds normally. Pollen and seed fertility averaged 90% and 82%, respectively. F1 hybrids between CMS and the restorer are fully pollen fertile and show normal seed set. Preliminary results indicate that restoration is achieved by a single dominant gene. The constitution of the organelle genomes of the CMS, restorer and fertility restored plants is identical, as revealed by Southern analysis using mitochondrial and chloroplast probes atp A and psb D, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2001.00627_x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Enarthrocarpus lyratus-based cytoplasmic male sterility and fertility restorer system in Brassica rapa (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 122 (2003), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Substituting the nuclear genome of Brassica rapa into the cytoplasmic background of Enarthrocarpus lyratus through backcross substitution helped in developing cytoplasmic male sterility (CMS). Alloplasmic male sterile plants had pale green leaves, small flowers with narrow petals and rudimentary anthers. Female fertility, low initially, improved considerably with advanced backcross generations. Male sterility expression was stable throughout the growing season. Except for EC 339014, all B. rapa accessions (38) evaluated were partial maintainers of the male sterility. Introgression of gene(s) for fertility restoration from the cytoplasm donor species was facilitated by homoeologous pairing between B. rapa and E. lyratus genomes, as was apparent from the very frequent occurrence of a trivalent in the monosomic addition plants (2n = 10 II + 1 I). Backcrossing of fertile monosomic addition plants with B. rapa led to the recovery of male fertile plants possessing the stable euploid chromosome number (2n = 20). These plants restored male fertility in crosses with different (lyr) CMS B. rapa genotypes, confirming the introgression of fertility restorer gene(s) from E. lyratus, the cytoplasm donor species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00836.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Responses of strawberry fruit to 1-Methylcyclopropene (1-MCP) and ethylene (2000)
    Springer
    Plant growth regulation 32 (2000), S. 83-90 
    Details
    ISSN: 1573-5087
    Keywords: ethylene production ; Fragaria ananassa ; ionic conductivity ; 1-MCP ; peroxidase ; respiration ; ripening index ; strawberry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract 1-Methylcyclopropene (1-MCP), a competitive inhibitorof ethylene action, binds to the ethylene receptor toregulate tissue responses to ethylene. In this work,we investigated the effects of 1-MCP and exogenousethylene on ripening, respiration rate, ionicconductivity and peroxidase activity in strawberryfruit. Strawberry fruit can ripen without exogenousethylene treatment, but exogenous ethylene inducessecondary ripening processes. Results indicated thatstimulation of respiration by ethylene wasdose-dependent. Fruit colour development and softeningwere slightly accelerated by ethylene, but changes insoluble solid content were not. 1-MCP may/may notaffect the respiratory rise induced by exogenousethylene dependent on fruit maturity. Cycloheximide(CHI) reduced the ethylene-induced respiratoryincrease. Combinations of 1-MCP and CHI reducedrespiration more than CHI alone. 1-MCP and CHI did notinfluence the primary respiratory change in nonethylene-treated fruit. This indicates that ethyleneinduced respiratory increase may involve an ethylenereceptor in early harvested fruit, but not in laterharvested fruit. Exogenous ethylene stimulatedrespiration by regulating new respiratory enzyme(s)synthesis in strawberry fruit. Ethylene induced anionic leakage increase, and this was positivelycorrelated to fruit water loss and peroxidaseactivity. These results suggest that non-climactericfruit, such as strawberry, may have different ethylenereceptor(s) and/or ethylene receptor(s) may havedifferent regulatory functions. It may be thesecondary effect of ethylene to stimulate respirationin strawberry. Non-climacteric fruit ripening may berelated to the development of active oxygen species(AOS) induced by postharvest stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006409719333
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Phloroglucinol enhances growth and rate of axillary shoot proliferation in potato shoot tip cultures in vitro (2000)
    Springer
    Plant cell, tissue and organ culture 60 (2000), S. 139-149 
    Details
    ISSN: 1573-5044
    Keywords: 1 ; 3 ; 5-benzenetriol ; Dilospan S ; meristem culture ; micropropagation ; phenolic compound ; phloroglucinol ; Solanum tuberosum L. ; 1 ; 3 ; 5-trihydroxybenzene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Efficacy of phloroglucinol in promoting growth and development of in vitro-derived shoot tips was studied in six potato (Solanum tuberosum L.) genotypes. Different concentrations of phloroglucinol (0, 0.08, 0.4, 0.8, 1.2 and 1.6 mM) were tested in combination with either 0.1 or 0.2 M sucrose in shoot tip proliferation medium based on MS (Murashige and Skoog, 1962) medium supplemented with 5.8 μM GA3 (gibberellic acid), 1.1 μM BA (N6-benzyladenine) and 8.39 μM D-calcium pantothenate. Phloroglucinol fostered multiple shoot formation, promoted axillary shoot proliferation in terms of shoot tip fresh weight and shoot length, and stimulated root formation on the shoot tips. There was significant phloroglucinol × sucrose interaction for number of shoots developed per shoot tip, shoot tip fresh weight and number of roots induced per shoot tip. The beneficial effect of phloroglucinol on shoot tip survival was conspicuous only in genotypes that showed poor survival in the control proliferation medium. There were significant differences in response between the two sucrose levels with regard to shoot tip fresh weight and number of roots per shoot tip. Phloroglucinol in combination with 0.2 M sucrose induced maximum number of roots per shoot tip. Optimum shoot tip growth was fostered in medium containing 0.8 mM phloroglucinol and 0.2 M sucrose. High frequency multiple shoot formation in this medium ensures a faster rate of potato shoot tip multiplication within a limited time and space.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006419805980
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of nickel(II)-di(2,3-dichlorophenyl)carbazonate and its adduct formation with heterocyclic nitrogen bases (2000)
    Springer
    Transition metal chemistry 25 (2000), S. 178-182 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The nickel(II)-di(2,3-dichlorophenyl)carbazonate [Ni(D2,3DClPC)2] complex has been prepared and characterized by elemental and spectral studies. The NiII chelate forms adducts with heterocyclic nitrogen bases, which were studied spectrophotometrically in monophase CHCl3 media. Saturated monodentate bases such as pyrrolidine, piperidine, etc., form pentacoordinate adducts of 1:1 stoichiometry, whereas bidentate and unsaturated monodentate bases form hexacoordinated adducts with 1:1 and 1:2 metal–ligand stoichiometries respectively. The results are discussed interms of steric properties, basicity and ring structures of the heterocyclic bases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007054500699
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Isolation and Characterization of the Thylakoid Membranes from the NaCl-Resistant (NaClr) Mutant Strain of the Cyanobacterium Anabaena variabilis (2000)
    Springer
    Current microbiology 41 (2000), S. 321-327 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract NaCl-induced changes in the thylakoid membrane of wild-type Anabaena variabilis and its NaClr mutant strain have been studied. Biochemical characterization of the thylakoid membrane was done by taking its absorption and fluorescence spectra at different wavelength. The thylakoid membranes of both strains were isolated by mechanical disruption of the freeze-dried and lysozyme-treated cells, followed by differential and density gradient centrifugation. The light absorption spectra of the thylakoid membrane showed three and two peaks in NaClr mutant strain and its wild-type counterpart respectively at wavelengths of 400–850 nm. These peaks revealed that the thylakoid membrane contains a large amount of carotenoid and chlorophyll a. Fluorescence emission spectra of thylakoid membrane of NaClr mutant and its wild-type strain at excitation wavelength of 335 nm showed two different peaks, one at 340 nm and the other at 663 nm respectively. The light absorption and fluorescence spectra of the thylakoid membrane also revealed that the membrane contained carotenoid pigment, chlorophyll (Chl) a, and a pigment with an emission peak at 335 nm. The HPLC analysis of the pigments of the thylakoid membrane indicates that the NaClr mutant strain under NaCl stress contained an additional peak for the carotenoid pigment, which was lacking in its wild-type counterpart. The major peak in thylakoid membrane was that of echinenone and β-carotene. Whereas the polypeptide composition of thylakoid membrane differed in the wild-type and its NaClr mutant strain, no difference in the cell wall protein pattern was observed in both strains. The thylakoid membrane of NaClr mutant strain contained two additional protein bands that were absent in its wild-type counterpart. The thylakoid membrane of the wild-type and its NaClr mutant strain also showed morphological variations under NaCl stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002840010143
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...