Search results for "Orchidaceae"
showing 4 items of 24 documents
Ernesta Foldāta albums
1991
Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekciju krājumā atrodas ar latviešu orhideju pētnieku Ernestu Foldātu (1925-2003) saistīti materiāli. Viens no tiem ir Ernesta Foldāta sastādīts albums ar savu diplomu un sertifikātu (iegūtu Venecuēlā un Latvijā) kopijām, dažu paša atklātu orhideju sugu fotoattēliem un zīmējumiem.
Effects of defoliation on male and female reproductive traits of a perennial orchid, Dactylorhiza maculata
2000
1The effects of defoliation on male reproductive traits of plants have received little attention. We conducted two field experiments with Dactylorhiza maculata (L.) Soo to examine the effects of defoliation on both male and female reproductive traits. We removed 0, 50 or 100% of leaves prior to flowering. The quality of pollen was tested by transferring pollen from the differently treated plants to untreated plants of the same population. 2The non-defoliated plants did not differ from the defoliated plants in mass of pollinia. No differences were found in the weight of seed capsules or in the proportion of embryonic seeds raised by flowers receiving pollen from differently treated pollen do…
Reproductive success ofDactylorhiza incarnatassp.incarnata(Orchidaceae): the effects of population size and plant visibility
2007
Reproduction of plants pollinated solely by flower-visiting animals depends on the ability of the population and each of its flowering member to attract pollinators. Factors affecting the pollination of nectarless species differ somewhat from those affecting the pollination of rewarding species due to the avoidance behaviour of pollinators after visiting empty flowers. We studied a non-mimic food-deceptive orchid, Dactylorhiza incarnata ssp. incarnata, in 16 populations in central Finland to examine if population properties and plant size affected reproductive success of plants. We found that the number of flowering plants increased total pollinia removal and seed production of the populati…
Origami orhideju modeļu locīšana
2020
Attālināta nodarbība "Orhideju dzimta, orhideju pētnieks Ernests Foldāts, origami orhideju modeļu locīšana", kurā stāstīts par orhideju dzimtu, tās raksturojumu, Latvijā savvaļā sastopāmajām šīs dzimtas sugām, par orhideju pētnieku Ernestu Foldātu (1925-2003), kā arī piedāvātas 3 dažādu sarežģītības pakāpju orhideju origami modeļu locīšanas video instrukcijas.