Wyniki wyszukiwania

1

Otrzymywanie i wykorzystanie linii podwojonych haploidow zboz

100%

Wedzony M.

Biotechnologia

|

2001

|

nr 1

51-62

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Uniwersytet Rolniczy w Wageningen [Holandia] a programy nauczania na polskich uczelniach rolniczych

100%

Wedzony M.

Postępy Nauk Rolniczych

|

1997

|

tom 44

|

nr 1

121-130

3

Endopolyploidy and structure of nuclei in the antipodals and synergids of Ranunculus baudotii Godr.

100%

Wedzony M.

Acta Biologica Cracoviensia. Series Botanica

|

1982

|

tom 24

4

Pollen tube growth in Triticale x maize crosses

100%

Wedzony M.

Journal of Applied Genetics

|

1996

|

tom 37A

5

Polytenization in the antipodal nuclei of wheat [Triticum aestivum L.], triticale [xTriticosecale Wittm.] and their reciprocal crosses

100%

Wedzony M.

Acta Biologica Cracoviensia. Series Botanica

|

1992-1993

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tom 34-35

The antipodals of the mature embryo sacs of wheat (Triticum aestivum L.) and triticale (xTriticosecale Wittm.), as well as those of the embryo sacs developing after reciprocal cross pollination of these taxa were investigated. In a single embryo sac there were on average 14 antipodals in triticale and 18,5 in wheat. The endoreduplication cycles were stated in the antipodal nuclei. Before the pollination they led to a maximum degree of ploidy 8n in triticale and 16n in wheat. Within three days after the pollination a number of the antipodal nuclei reached 256n in the triticale ♀ x wheat ♂ cross and 512n in the reciprocal cross. The polytene chromosomes resulted from a gradual condensation of chromatin with the increasing degree of ploidy. They were the only type of the chromatin organization found in all the antipodal nuclei over 32n degree of ploidy. In both crosses the first signs of disintegration of the antipodal apparatus were found three days after the pollination. At that time the cellularization of the initially coenocitic endosperm was starting in the triticale ♀ x wheat ♂ cross. By contrast, the latter process was withheld in the reciprocal cross, which together with other disturbances of the endosperm development caused almost complete kernels sterility. The possibility of improper interaction of the mother derived antipodal apparatus with the hybrid endosperm was discussed.

6

Media for embryo-rescue culture of wheat, triticale, their hybrids and haploids

100%

Wedzony M.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 2

7

Early postfertilization embryo sac development Triticum aestivum and xTriticosecale reciprocal crosses

100%

Wedzony M.

Acta Biologica Cracoviensia. Series Botanica

|

1995

|

tom 37

Embryo sac development in reciprocal crosses of winter, hexaploid: wheat (Triticum aestivum L. cultivar ‘Liwilla’) and triticale (xTriticosecale Wittm. strain CHD 464) was examined during the first five days after pollination. Double fertilization was found in both crosses. Embryos developed regularly, slower however in the wheat ♀ x triticale ♂ cross. Aberrant, polyploid (up to 24n) endosperm nuclei were formed through disturbed mitotic cycles in both crosses. They occurred more frequently in the wheat ♀ x x triticale ♂ cross. Also, an early desynchronization of nuclear divisions and an uneven distribution of endosperm nuclei were found in the latter cross. They were accompanied with delayed or not complete cellularization of endosperm and its degradation in some regions. These abnormalities are the possible cause of the severe kernel sterility in the wheat ♀ x triticale ♂ cross. In contrast, the reciprocal cross produced shrivelled but mostly viable kernels.

8

Penetration of maize [Zea mays L.] pollen tube to the Triticale [xTriticosecale Wittm.] embryo sac

100%

Wedzony M.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1997

|

tom 45

|

nr 2-4

9

Possible factors of increased resistance of triticale (xTriticosecale Wittm.) to pink snow mould (Microdochium nivale) infection

63%

Golebiowska B., Wedzony M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

10

Cold-hardening of winter triticale (X Triticosecale Wittm.) results in increased resistance to pink snow mould Microdochium nivale (Fr., Samuels and Hallett) and genotype-dependent chlorophyll fluorescence modulations

63%

Golebiowska G., Wedzony M.

Acta Physiologiae Plantarum

|

2009

|

tom 31

|

nr 6

The resistance of triticale (x Triticosecale Wittm.) to infection of snow mould Microdochium nivale (Fr., Samuels & Hallett) was examined under different temperature pre-treatment regimes. The results of laboratory ‘‘cold chamber’’ resistance tests correlated with the breeders’ report from field experiments. Studied genotypes differed substantially in their resistance to infection. Two cultivars: ‘Magnat’ (susceptible) and ‘Hewo’ (relatively resistant) were further studied as a plant model to test the role of pre-hardening and cold-hardening induction of resistance expression. Both model cultivars were susceptible to M. nivale infection without cold pre-treatment and gained genotype-depended level of resistance after 4 weeks treatment at 4°C, moreover the resistance grew gradually. Simultaneously to the resistance tests, the measurements of chlorophyll fluorescence parameters were taken. The results showed that higher vitality index Rfd of coldhardened triticale seedlings correlated with increased pink snow mould resistance while differences in other parameters of fluorescence were not distinctly significant. Establishment of Rfd in 4 weeks hardened triticale seedlings could be used for a large scale screening of breeding material in order to select potentially resistant genotypes. Such analyses have not been reported for triticale before.

11

Germination of petunia ( Petunia hybrida Hort.) pollen in presence of external electric field

63%

Wedzony M., Filek M.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 1 suppl.

12

Changes of electric potential in wheat pistils induced by pollination

63%

Wedzony M., Filek M.

Acta Societatis Botanicorum Poloniae

|

1996

|

tom 65

|

nr 1-2

97-100

13

Endopolyploidy in the antipodals of Ranunculus subgenus Batrachium

63%

Turala-Szybowska K., Wedzony M.

Acta Societatis Botanicorum Poloniae

|

1981

|

tom 50

|

nr 1-2

14

Udoskonalenie metod otrzymywania linii podwojonych haploidow pszenzyta jako materialu do hodowli

63%

Wedzony M., Marcinska I.

Działalność Naukowa PAN. Wybrane Zagadnienia

|

1998

|

tom 05

141-142

15

Induced by pollination changes of electric potential in pistils of Petunia hybrida L. and Brassica napus L.

63%

Wedzony M., Filek M.

Acta Biologica Cracoviensia. Series Botanica et Zoologia. Supplement

|

1997

|

tom 39

|

nr 1

16

Changes of electric potential in pistils of Petunia hybrida Hort. and Brassica napus L. during pollination

63%

Wedzony M., Filek M.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 3

The pattern of electric signals accompanying compatible and incompatible pollination were studied in pistils of petunia (Petunia hybrida L.) and rape (Brassica napus L). Electric potential was recorded for 4–7 hours with non-polarizable Ag/AgCl electrodes implanted into the ovary and beneath the sigma. At the end of measurements, pistils were fixed and the growth of pollen tubes was analyzed under a fluorescent microscope. Action potentials appeared in both species. In rape the potential dropped by 10 mV for few minutes after pollination regardless of the compatibility of the cross. In this species, during compatible pollination action potentials with amplitudes of 15–20 mV were recorded up to one hour after pollination. They were followed by a long lasting decrease of the potential by 10 to 50 mV. Contrary, after the self-incompatible pollination, action potentials were rare and of lower amplitudes and the potential gradually raised in comparison to the initial level. During the first hour after the compatible pollination of Petunia hybrida series of action potentials with amplitudes reaching 10–20 mV were recorded. At the time corresponding to the pollen tubes entrance to the transmitting tissue of the style, action potentials reaching up to 40 mV were followed by a steady decrease of the potential. The electric signals traveled along the style with velocity of 25 mm/s. Incompatible pollination in petunia resulted only in minor oscillation and gradual increase of the potential up to 100 mV in comparison to the initial level. The present investigation demonstrated that each phase of pollen-stigma recognition events, germination and growth of pollen tubes within the style have its characteristic pattern of electric changes which was species specific and depended on compatibility of the cross.

17

Cutin in the embryogenesis of triticale [xTriticosecale Wittm.]

63%

Szczuka E., Wedzony M.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 2

18

The heat emission of triticale [xTriticosecale Wittm.] pistils following pollination and-or dicamba treatment

63%

Wedzony M., Zur I.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

1999

|

tom 41

|

nr 1

19

Wpływ zearalenonu i analogów auksyn w stymulacji wzrostu haploidalnych zarodków

51%

Biesaga-Koscielniak J., Wedzony M., Marcinska I., Koscielniak J.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2000

|

tom 473

20

Androgenesis in isolated microspores of triticale (Xtriticossecale Wittm.) induced by stress treatments

51%

Zur I., Dubas E., Golemiec E., Wedzony M.

Acta Physiologiae Plantarum

|

2004

|

tom 26

|

nr 3 suppl.

Ograniczanie wyników

Otrzymywanie i wykorzystanie linii podwojonych haploidow zboz

Uniwersytet Rolniczy w Wageningen [Holandia] a programy nauczania na polskich uczelniach rolniczych

Endopolyploidy and structure of nuclei in the antipodals and synergids of Ranunculus baudotii Godr.

Pollen tube growth in Triticale x maize crosses

Polytenization in the antipodal nuclei of wheat [Triticum aestivum L.], triticale [xTriticosecale Wittm.] and their reciprocal crosses

Media for embryo-rescue culture of wheat, triticale, their hybrids and haploids

Early postfertilization embryo sac development Triticum aestivum and xTriticosecale reciprocal crosses

Penetration of maize [Zea mays L.] pollen tube to the Triticale [xTriticosecale Wittm.] embryo sac

Possible factors of increased resistance of triticale (xTriticosecale Wittm.) to pink snow mould (Microdochium nivale) infection

Cold-hardening of winter triticale (X Triticosecale Wittm.) results in increased resistance to pink snow mould Microdochium nivale (Fr., Samuels and Hallett) and genotype-dependent chlorophyll fluorescence modulations

Germination of petunia ( Petunia hybrida Hort.) pollen in presence of external electric field

Changes of electric potential in wheat pistils induced by pollination

Endopolyploidy in the antipodals of Ranunculus subgenus Batrachium

Udoskonalenie metod otrzymywania linii podwojonych haploidow pszenzyta jako materialu do hodowli

Induced by pollination changes of electric potential in pistils of Petunia hybrida L. and Brassica napus L.

Changes of electric potential in pistils of Petunia hybrida Hort. and Brassica napus L. during pollination

Cutin in the embryogenesis of triticale [xTriticosecale Wittm.]

The heat emission of triticale [xTriticosecale Wittm.] pistils following pollination and-or dicamba treatment

Wpływ zearalenonu i analogów auksyn w stymulacji wzrostu haploidalnych zarodków

Androgenesis in isolated microspores of triticale (Xtriticossecale Wittm.) induced by stress treatments