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1

Morphological features in petaloid cytoplasmic male-sterile lines of carrot [Daucus carota L.] in the vegetative phase

100%
Kozik E. U., Nowak R.
Vegetable Crops Research Bulletin
|
2002
|
tom 56
2
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Leaf architecture, lignification, and tensile strength during vegetative phase change in Zea mays

84%
Balsamo R. A., Orkwiszewski J. A. J.
Acta Societatis Botanicorum Poloniae
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2008
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tom 77
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nr 3
181-188
Background and Aims: Leaf morphology, anatomy, degree of lignification, and tensile strength were studied during vegetative phase change in an inbred line of Zea mays (OH43 x W23) to determine factors that influence mechanical properties during development. Methods: Tensometer, light microscopy, histochemistry. Key results: Mature leaf length increased linearly with plant development, peaked at leaves 7 and 8 (corresponding to the onset of the adult phase) and then declined. Leaf width was stable for leaves 1 through 3, increased to leaf 7, remained stable to leaf 10, and then declined through leaf 13. Lamina thickness was highest for leaf 1 and decreased throughout development. Leaf failure load to width ratio and failure load to thickness ratio increased with development suggesting that changes in leaf morphology during development do not entirely account for increases in failure load. Histochemical analyses revealed that leaf tensile strength correlates with percent lignification and the onset of anatomical adult features at various developmental stages. Conclusions: These data demonstrate that in Zea mays lignification of the midrib parenchyma and epidermis may be directly correlated with increased tensile strength associated with phase change from juvenility to adulthood. Failure load and resultant tensile strength values are primarily determined by the percent tissue lignification and the appearance of leaf architectural characters that are associated with the transition from the juvenile to the adult phase. Increased mechanical stability that occurs during the phase transition from juvenility to adulthood may signify a fundamental change in strategy for an individual plant from rapid growth (survival) to reproduction.
3
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Effect of devernalization on the transition from vegetative to prefloral phase of the broccoli (Brassica oleracea var. italica cv. 'Fiesta') shoot meristem

84%
Zenkteler E., Samardakiewicz S., Kaluzewicz A., Knaflewski M.
Acta Agrobotanica
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2012
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tom 65
|
nr 1
The morphological and histological changes which occur in the cold-induced apical meristem of broccoli (B. oleracea var. italica cv. ‘Fiesta’) during transition from the vegetative to the generative phase have been demonstrated in our previous investigations. Now, a light microscopic study on the micromorphological parameters of the tunica and corpus of the meristem was undertaken to ascertain their association with devernalisation. Changes in the apex of broccoli seedlings grown for 26 days at 24oC, succeeded by 35 days of cold treatment (16oC - vernalization) followed by 14 days of warm treatment (24oC - devernalization), were studied and described. Microscopic analysis according to the new method of slide preparation showed cytohistological zonation and the spatial distribution of cells in the central and peripheral zones of the broccoli shoot meristem more precisely than possible hitherto. Comparison between subsequent stages of meristem reorganization after devernalization revealed variation in the structure of the apex during its transition to the evocation phase of flowering. The results of measurements show that the tunica width changes irregularly, increasing from its minimum value (112.39±5.78 μm) through the medium one to the maximum values (260.32±2.50), to decrease again, while its height increased and decreased sinusoidally from its minimum value (21.52±4.30μm) to the maximum one (76.98±7.44μm) and then decreasing again to the minimum value (21.52±4.30). The stratification of the tunica as well as its width and height revealed relatively low variation within the analyzed time. These structural traits correlated with cold/warm treatments may be further utilized in the broccoli breeding programme against developmental disturbances.
4
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An evaluation of some morphological traits in doubled haploid lines and their F1 hybrids of head cabbage Kamienna Glowa in the vegetative phase

84%
Kaminski P.
Journal of Applied Genetics
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2000
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tom 41
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nr 4
5

Effect of thermal conditions on the initiation of broccoli curd

67%
Kaluzewicz A., Kordakow J., Czosnowski E., Knaflewski M.
Electronic Journal of Polish Agricultural Universities. Series: Horticulture
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2002
|
tom 05
|
nr 2
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