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Recent distribution and phytosociological affiliation of Ludwigia palustris in Slovakia

100%

Dite D., Elias Jr. P., Dite Z., Simkova A.

Acta Societatis Botanicorum Poloniae

2017

tom 86

nr 1

Ludwigia palustris has always been a very rare species in Central Europe. In Slovakia, its occurrence remained unconfirmed for over 60 years and it was therefore considered extinct. The paper reports its rediscovery on two sites in SE Slovakia. Both localities were found in the Latorica River catchment area in 2015 when persistent summer droughts enabled the development of natural mudflat vegetation in the dried oxbows. Confirmation of this historic site indicates the long-term survival ability of the species. We assigned L. palustris dominated vegetation in the class Isoëto-Nanojuncetea, association Ludwigio palustris-Lindernietum procumbentis. This association is new to Slovakia as well as for Central Europe. The stands of this association developed on the exposed muddy shores of disconnected oxbow lake.

Reproductive biology of two edible honeysuckles [Lonicera edulis Turcz. ex Freyn., Lonicera kamtchatica (Sevast.) Pojark.] in the conditions of southwestern Slovakia

100%

Durisova L., Jurikova T., Elias Jr. P., Mlcek J.

Acta Scientiarum Polonorum. Hortorum Cultus

2020

tom 19

nr 3

The formation and development of reproductive organs and fruits was examined for two edible honeysuckle species Lonicera edulis Turcz. ex. Freyn. and Lonicera kamtchatica (Sevast.) Pojark. ‘Gerda’ using cytological and embryological methods. We found out that the flower initiation has began during June in the conditions of southwestern Slovakia. Male and female archespores were differentiated before entering winter dormancy. In most cases we have observed normally developed tetrads, normal appearance of microspores, two-celled polen grains and mature pollen grain. In both species a sufficient amount of normally developed pollen grains was observed. Disturbances during female gametophyte development occurred occasionally, most mature ovules contained 7 cells female gametophyte. Our research pointed to fact that the species are protogynous. Flowering usually takes place in the first half of April. The fruits were mature in the second half of May. We have found that 10 to 11 fully developed seeds have evolved in the fruits of both representatives of Lonicera on average. The above results show the suitability of L. edulis and L. kamtchatica cultivation in SW Slovakia with a relatively low risk of fruit loss due to climatic conditions.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Acta Societatis Botanicorum Poloniae

2 Elias Jr. P.

1 Dite D.

1 Dite Z.

1 Durisova L.

1 Jurikova T.

1 Mlcek J.

1 Simkova A.

1 2020

1 2017

Wyniki wyszukiwania

Recent distribution and phytosociological affiliation of Ludwigia palustris in Slovakia

Reproductive biology of two edible honeysuckles [Lonicera edulis Turcz. ex Freyn., Lonicera kamtchatica (Sevast.) Pojark.] in the conditions of southwestern Slovakia