scholarly journals Photosynthetic compensation by the reproductive structures in the spring ephemeral Gagea lutea

Plant Ecology ◽  
2012 ◽  
Vol 214 (2) ◽  
pp. 175-188 ◽  
Author(s):  
Ninuola Sunmonu ◽  
Takashi Y. Ida ◽  
Gaku Kudo
Keyword(s):  
Reproductive Structures ◽  
Spring Ephemeral ◽  
Gagea Lutea

scholarly journals Ephemerality of a Spring Ephemeral Gagea lutea (L.) is Attributable to Shoot Senescence Induced by Free Linolenic Acid

2017 ◽  
Vol 58 (10) ◽  
pp. 1724-1729 ◽  
Author(s):  
Hiroko Iwanami ◽  
Noboru Takada ◽  
Yasunori Koda
Keyword(s):  
Linolenic Acid ◽  
Spring Ephemeral ◽  
Gagea Lutea

The function of multiple flowers of a spring ephemeral, Gagea lutea (Liliaceae), with reference to blooming order

1998 ◽  
Vol 76 (8) ◽  
pp. 1404-1411 ◽  
Author(s):  
Yoko Nishikawa
Keyword(s):  
Seed Production ◽  
Seed Set ◽  
Dry Weight ◽  
Plant Size ◽  
Fertilization Rate ◽  
Early Summer ◽  
Flowering Pattern ◽  
Female Function ◽  
Spring Ephemeral ◽  
Gagea Lutea

Flowering pattern, seed-set success, and allocation to male and female functions of a spring ephemeral lily, Gagea lutea, were compared within individual inflorescences. Although the number of flowers increased with plant size and anthesis was extended as the number of flowers increased from one to four, the total number of seeds produced per plant did not increase with the number of flowers under natural conditions. The later-blooming flowers were smaller in size than the earlier ones within an inflorescence, and the ratio of stamen dry weight to pistil dry weight in the later flowers was higher than that in the earlier ones. Although the ovule fertilization rate was increased by artificial pollination, it was lower in the later flowers than in the earlier ones within an inflorescence. Neither nutrient addition to the soil nor removal of earlier flowers increased the seed production of the later flowers. These results indicated that the later flowers had a lower potential for female function than did the earlier ones and that this was probably due to variation inherent in inflorescence architecture. Seed production of the later flowers was also limited by the time needed for seed maturation because the aboveground part of G. lutea died soon after canopy closure in early summer. Furthermore, the later flowers probably contributed to the reproductive success of a plant as pollen donors.Key words: flowering order, Gagea lutea, resource allocation, seed production, short growing season.

Freeze substitution fixation of fungal reproductive structures and spores

1989 ◽  
Vol 47 ◽  
pp. 990-991
Author(s):  
C. W. Mims ◽  
E. A. Richardson
Keyword(s):  
Plant Pathogens ◽  
Freeze Substitution ◽  
Uranyl Acetate ◽  
Chemical Fixation ◽  
Dialysis Membrane ◽  
Razor Blade ◽  
Thin Sections ◽  
Reproductive Structures ◽  
Dry Down ◽  
Diamond Knife

The advantages of freeze substitution fixation over conventional chemical fixation for preservation of ultrastructural details in fungi have been discussed by various authors. As most ascomycetes, basidiomycetes and deuteromycetes do not fix well using conventional chemical fixation protocols, freeze substitution has attracted the attention of many individuals interested in fungal ultrastructure. Thus far most workers using this technique on fungi have concentrated on thin walled somatic hyphae. However, in our laboratory we have experimented with the use of freeze substitution on a variety of fungal reproductive structures and spores with promising results.Here we present data on freeze substituted samples of sporangia of the zygomycete Umbellopsis vinacea, basidia of Exobasidium camelliae var. gracilis, developing teliospores of the smut Sporisorium sorghi, germinating teliospores of the rust Gymnosporangium clavipes, germinating conidia of the deuteromycete Cercosporidium personatum, and developing ascospores of Ascodesmis nigricans.Spores of G. clavipes and C. personatum were deposited on moist pieces of sterile dialysis membrane where they hydrated and germinated. Asci of A. nigricans developed on pieces of dialysis membrane lying on nutrient agar plates. U. vinacea was cultured on small pieces of agar-coated wire. In the plant pathogens E. camelliae var. gracilis and S. sorghi, a razor blade was used to remove smal1 pieces of infected host issue. All samples were plunged directly into liquid propane and processed for study according to Hoch.l Samples on dialysis membrane were flat embedded. Serial thin sections were cut using a diamond knife, collected on slot grids, and allowed to dry down onto Formvar coated aluminum racks. Sections were post stained with uranyl acetate and lead citrate.

Taxonomic Treatment of the Tillandsia utriculata Complex (Bromeliaceae)

2019 ◽  
Vol 104 (2) ◽  
pp. 262-323
Author(s):  
Juan P. Pinzón ◽  
Ivón M. Ramírez-Morillo ◽  
Germán Carnevali ◽  
Walter Till ◽  
Derek Butcher ◽  
...  
Keyword(s):  
Diagnostic Characters ◽  
Taxonomic Treatment ◽  
Reproductive Structures ◽  
Taxonomic Information

The taxonomic treatment of the 18 species composing the Tillandsia utriculata L. complex s.l. is presented. A description and a diagnosis of the group are provided, as well as two artificial keys to species, each emphasizing characters from living plants or from exsiccatae, respectively. Complete taxonomic information is given, including taxonomic citation, synonymy, etymology or eponimy, description, specimens examined, phenology, nomenclatural notes, relationships and diagnostic characters, variation, ecology and distribution, together with plates of living plants and vegetative and reproductive structures, as well as maps of distribution.

Status of Family Fissidentaceae in Gujarat

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
D.G. Shah ◽  
D.N. Mehta ◽  
R.V. Gujar
Keyword(s):  
Distinct Species ◽  
The State ◽  
The Other ◽  
Land Plants ◽  
Reproductive Structures ◽  
The Family ◽  
The Status ◽  
Vegetative Characters ◽  
First Time ◽  
Different Parts

Bryophytes are the second largest group of land plants and are also known as the amphibians of the plant kingdom. 67 species of bryophytes have been reported from select locations across the state of Gujrat. The status of family fissidentaceae which is a large moss family is being presented in this paper. Globally the family consists of 10 genera but only one genus, Fissidens Hedw. has been collected from Gujarat. Fissidens is characterized by a unique leaf structure and shows the presence of three distinct lamina, the dorsal, the ventral and the vaginant lamina. A total of 8 species of Fissidens have been reported from the state based on vegetative characters as no sporophyte stages were collected earlier. Species reported from the neighboring states also showed the absence of sporophytes. The identification of different species was difficult due to substantial overlap in vegetative characters. Hence a detailed study on the diversity of members of Fissidentaceae in Gujarat was carried out between November 2013 and February 2015. In present study 8 distinct species of Fissidens have been collected from different parts of the state. Three species Fissidens splachnobryoides Broth., Fissidens zollingerii Mont. and Fissidens curvato-involutus Dixon. have been identified while the other five are still to be identified. Fissidens zollingerii Mont. and Fissidens xiphoides M. Fleisch., which have been reported as distinct species are actually synonyms according to TROPICOS database. The presence of sexual reproductive structures and sporophytes for several Fissidens species are also being reported for the first time from the state.

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