scholarly journals Special features of fruiting in some Clematis L. cultivars from the collection of the Nikita Botanical Gardens

2021 ◽  
Vol 21 (2) ◽  
pp. 196-202
Author(s):  
Natalya V. Zubkova ◽  
Keyword(s):  
Seed Production ◽  
High Potential ◽  
Germination Capacity ◽  
Southern Coast ◽  
Morphometric Characteristics ◽  
Botanical Gardens ◽  
Viable Seeds

The article presents the results of studying the fruiting in 9 clematis cultivars under the conditions of the southern coast of Crimea. Morphometric characteristics of seeds, their weight and germination capacity are given. Potential and real seed production was assessed. It was found that the studied cultivars are characterized with high potential seed production, on average from 38.1 to 116.9 ovules per fruit, but relatively low real seed production, on average from 1.3 to 8.3 seeds per fruit. Among the studied cultivars, the largest number of viable seeds formed per plant was noted in 4 cultivars: ‘Jan Pawel II’, ‘Ramona’, ‘Elegia’ and ‘Juulii’. These cultivars are recommended for use in breeding works as maternal parental forms.

scholarly journals To the study of fruit bearing pecularities of Iris x hybrida hort. under the conditions of the Southern Coast of the Crimea

2020 ◽  
pp. 84-92
Author(s):  
I. V. Ulanovskaya ◽  
V. A. Shishkin ◽  
A. L. Sheinina ◽  
E. P. Rybalkin
Keyword(s):  
Experimental Data ◽  
Seed Production ◽  
Southern Coast ◽  
Seed Productivity ◽  
Scientific Center ◽  
Primary Processing ◽  
Botanical Gardens ◽  
The Crimea ◽  
Plant Level

The article describes approaches to the study of fruiting cultivars Iris x hybrida hort. of the collection of the Nikitsky Botanical Gardens National Scientific Center of the garden group of high species, on the example of the cultivar 'Sky Hooks', and presents the primary processing of experimental data. The ratio of the average values of potential and actual seed productivity depends on: the number of generative shoots on the plant; the number of "levels" or branches on the generative shoot; the number of flowers and the number of fruits on the generative shoot; the number of fruits at a certain "level" of their location. Actual seed production of cultivars 'Sky Hooks' two times less potential, regardless of the number of generative shoots per plant, "level" location of the fetus, the number of "levels" on generative shoots, number of flowers and fruits on one generative shoots. The highest average values of potential and actual seed productivity correspond to the 3rd and 4th "levels".

scholarly journals Using of tea-hybrid roses from the Nikita Botanical Gardens’ collection in the floriculture of the Southern Coast of the Crimea

2020 ◽  
pp. 65-77
Author(s):  
Z. K. Klimenko ◽  
S. A. Plugatar ◽  
V. K. Zykova ◽  
I. N. Kravchenko
Keyword(s):  
Optimal Timing ◽  
Southern Coast ◽  
Botanical Gardens ◽  
Biological Features ◽  
Different Types ◽  
Open Ground ◽  
The Crimea ◽  
Comprehensive Study

The article presents the results of a long-term research on the introduction study and evaluation of cultivars of tea-hybrid roses introduced and selected by the Nikitsky Botanical Gardens to determine the possibilities of their use in floriculture of the Southern Coast of the Crimea. The research was conducted in the period from 1955 to 2014. The material for the study was 679 cultivars of garden roses from the tea-hybrid garden group of the collection of the Nikitsky Botanical Gardens. As a result of a comprehensive study, 400 cultivars are recommended for use in the floriculture of the Crimea. The main options for this use becomes the growing of tea-hybrid roses in the open ground for gardening purposes in bush and tree-shaped forms, as well as the growing cultivars for cutting in both open and protected ground. The biological features of the cultivars, which determine the possibility of different types of the use and the cultivars, that have these features were identified: 400 cultivars were recommended for use in landscaping in bush form, 45 cultivars - also in tree-shaped form, 226 cultivars are promising for cutting in the open ground and 107 cultivars - for forcing and cutting in greenhouses. The main methods of propagation of cultivars of tea-hybrid roses under the conditions of the Southern Coast of the Crimea are budding and rooting of green and hardwood cuttings. The optimal timing for propagation by each of these methods is indicated. The best rootstocks for budding were identified, depending on the type of their use in floriculture. 

EFFECTS OF BRACHYPTEROLUS PULICARIUS (L.) (COLEOPTERA: NITIDULIDAE) ON FLOWERING AND SEED PRODUCTION OF COMMON TOADFLAX

1992 ◽  
Vol 124 (4) ◽  
pp. 631-636 ◽  
Author(s):  
A.S. McClay
Keyword(s):  
Seed Production ◽  
Seed Weight ◽  
Shoot Biomass ◽  
Percentage Germination ◽  
Linaria Vulgaris ◽  
Potted Plants ◽  
Delayed Onset ◽  
Adult Feeding ◽  
Viable Seeds ◽  
Total Seed

AbstractImpact of the flower- and shoot-tip-feeding beetle, Brachypterolus pulicarius (L.), on growth, flowering, and seed production of common toadflax, Linaria vulgaris (L.) Mill., was investigated using potted plants. Brachypterolus pulicarius had no effect on root or shoot biomass of attacked plants. Adult feeding by B. pulicarius delayed onset of flowering by 27 days relative to controls. Flowering of attacked plants was suppressed from mid-June until mid-July, but by mid-August flowering was similar to that of control plants. Total seed weight, individual seed weight, and percentage germination were all reduced significantly on attacked plants, resulting in a 74% reduction in number of viable seeds produced. Brachypterolus pulicarius is univoltine in Alberta, overwintering mainly as pupae.

Impact of Clipping Timing on Japanese Hedgeparsley (Torilis japonica) Seed Production and Viability

2014 ◽  
Vol 7 (3) ◽  
pp. 511-516
Author(s):  
Mark J. Renz ◽  
R. Menyon Heflin
Keyword(s):  
United States ◽  
Seed Production ◽  
Management Strategy ◽  
Invasive Plant ◽  
Vegetative Stage ◽  
Effective Management ◽  
Viable Seed ◽  
Torilis Japonica ◽  
Forested Areas ◽  
Viable Seeds

AbstractJapanese hedgeparsley is a biennial plant that invades roadsides, rights-of way, and forested areas in the midwestern United States. Interest in managing populations by mechanical or hand-clipping techniques exists, but no information is available on the appropriate timing to maximize mortality and prevent the production of viable seed. To assess that, we applied clipping treatments at five periods throughout the summer to three Japanese hedgeparsley populations in southern Wisconsin and measured the number and viability of seeds produced by each plant during the year of treatment and the survival of plants clipped. Japanese hedgeparsley plants began producing seed by mid-July, but production was not maximized until early August. Viable seeds were not produced until early or mid-August, coinciding with the presence of ripened brown fruit. Clipping at any timing resulted in > 95% mortality by the fall of the treatment year. All plants that resprouted were in the vegetative stage when clipped, and no plants survived the following year. Results indicate that clipping Japanese hedgeparsley plants when they are in a reproductive phase before fruit turns brown is an effective management strategy for this invasive plant.

Distribution and reproductive capacity of Deschampsia antarctica and Colobanthus quitensis on Byers Peninsula, Livingston Island, South Shetland Islands, Antarctica

2013 ◽  
Vol 25 (2) ◽  
pp. 292-302 ◽  
Author(s):  
María Luisa Vera ◽  
Teresa Fernández-Teruel ◽  
Antonio Quesada
Keyword(s):  
Seed Production ◽  
Regional Climate ◽  
Regional Climate Change ◽  
Reproductive Capacity ◽  
South Shetland Islands ◽  
Deschampsia Antarctica ◽  
Shetland Islands ◽  
Colobanthus Quitensis ◽  
Livingston Island ◽  
Viable Seeds

AbstractThe Maritime Antarctic is one of the regions where regional climate change is most intense and the reproductive performance of plants may be enhanced. Reporting the distribution of Deschampsia antarctica and Colobanthus quitensis on Byers Peninsula (Livingston Island, South Shetland Islands), our results confirm that D. antarctica is more widespread than C. quitensis. Flower and seed development of both species varied between sites. Deschampsia antarctica produced more viable seeds than C. quitensis, although fully developed seeds were not found at all locations. Seed production in C. quitensis was low in comparison with other Antarctic locations. The largest cushions of Colobanthus observed in 2002 were 15 cm in diameter, suggesting that the populations may have established at least 50 years ago. Deschampsia antarctica tussocks were very often 20 cm in diameter, although turf areas up to 1.5 m across were also observed, probably due to coalesced aggregates of individuals. This study shows that, although seed production is low, the presence of seedlings and young individuals suggests an expansion process.

scholarly journals Some aspects of the study on the species Phacelia tanacetifolia Benth. as honey plant in the Republic of Moldova

2021 ◽  
Vol XII (2(21)) ◽  
Author(s):  
Natalia Cirlig ◽  
◽  
◽  
Keyword(s):  
Growing Season ◽  
Climatic Conditions ◽  
Germination Capacity ◽  
Republic Of Moldova ◽  
Development Cycle ◽  
The Subject ◽  
The Republic ◽  
Viable Seeds ◽  
Short Growing Season ◽  
Phacelia Tanacetifolia

Phacelia tanacetifolia Benth., which is a species with high potential as forage and honey plant, served as the subject of a new study. The species is characterized by short growing season, staggered and long flowering period (about 55 days depending on the climatic conditions and the date when it was sown). Under laboratory conditions, the germination capacity of the seeds is 84-92 %. The climatic conditions of the Republic of Moldova allow P. tanacetifolia plants to complete the whole ontogenetic development cycle – they bloom, bear fruit and produce viable seeds.

scholarly journals Main principles of ornamental crops cultivation under the conditions of the Southern Coast of the Crimea

2019 ◽  
pp. 9-16
Author(s):  
Yu. V. Plugatar ◽  
Z. K. Klimenko
Keyword(s):  
Ornamental Plants ◽  
Southern Coast ◽  
Botanical Gardens ◽  
Biological Features ◽  
The Crimea ◽  
Ornamental Crops

Introduction and breeding studies with ornamental plants have been carried out in the Nikitsky Botanical Gardens for about 200 years. During this time, 28 flower crops were studied. Currently, 8 flower collections are examined: garden roses, lilac, clematis, tulip, hybrid iris, hybrid daylily, garden canna, garden chrysanthemum. On the example of these flower cultures the biological features promoting success of cultivation of flower plants under the conditions of SCC are revealed and the main features of their agrotechnology under these conditions are given.

scholarly journals Ascorbic acid in the fruits and leaves of some persimmon cultivars in the Southern Coast of the Crimea

2021 ◽  
pp. 116-120
Author(s):  
O. A. Grebennikova ◽  
V. A. Melnikov
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Acid Content ◽  
Ascorbic Acid Content ◽  
Southern Coast ◽  
Additional Source ◽  
Botanical Gardens ◽  
The Crimea ◽  
Maximum Content

The results of the ascorbic acid content in the fruits and leaves of 10 persimmon cultivars from the Nikitsky Botanical Gardens’ collection are presented. It has been established that the concentration of ascorbic acid in technical persimmon fruits is 19,8-56,3 mg / 100 g, and in mature fruits it is 70-85% lower (5,08-8,96 mg / 100 g). Persimmon leaves contain 5-20 times more ascorbic acid than in fruits. The results showed the ability to use persimmon leaves as an additional source of vitamin C. The maximum content of ascorbic acid is allocated to the fruits of the cultivars Virginskaya Krupnoplodnaya, Delishes, Sidles and leaves of the cultivars Sidles and Zolotistaya.

scholarly journals The Relationship between Flower Age and Seed Production in Hatiora gaertneri and Schlumbergera truncata (Cactaceae)

HortScience ◽  
2005 ◽  
Vol 40 (7) ◽  
pp. 1988-1991
Author(s):  
Thomas H. Boyle
Keyword(s):  
Seed Production ◽  
Late Phase ◽  
Viable Seed ◽  
Flower Longevity ◽  
Degree Polynomial ◽  
Flower Opening ◽  
Production Studies ◽  
Flower Age ◽  
Viable Seeds ◽  
The Relationship

Flowers of two cacti [Hatiora gaertneri (Regel) Barthlott `Crimson Giant' and Schlumbergera truncata (Haworth) Moran `Eva'] were pollinated at different times between anthesis and senescence to determine the effect of floral age on seed production. Studies were conducted in a growth chamber (20 ± 0.5°C) to minimize temperature effects. Mean flower longevity (time from anthesis to first signs of senescence) was 4.7 days for S. truncata and 10.5 days for H. gaertneri. Stigmas of both species were receptive to pollination on the day of anthesis. The maximum number of viable seeds per pollinated flower was obtained when flowers of S. truncata and H. gaertneri were pollinated (respectively) on the second and fourth days after anthesis. For both species, the relationship between floral age and number of viable seeds per pollinated flower was described by a second-degree polynomial. The rate of pollen tube growth in the style was about 1.7 mm·h–1 for S. truncata and about 0.9 mm·h–1 for H. gaertneri. Some senesced flowers of H. gaertneri were capable of setting fruit with viable seed. Flowers of S. truncata did not set fruit when pollinated during the late phase of flower opening or after they had senesced. Senesced flowers of S. truncata failed to set fruit due to an insufficient number of pollen tubes reaching the ovary.

scholarly journals Effects of Fertilisation on Grass and Forb Gamic Reproduction in Semi-natural Grasslands

2021 ◽  
Author(s):  
Michele Scotton ◽  
Valentina Rossetti
Keyword(s):  
Seed Production ◽  
Shoot Density ◽  
Maturation Stage ◽  
Vegetation Changes ◽  
Variable Effect ◽  
Grassland Species ◽  
Grass Seed ◽  
Natural Grasslands ◽  
Soil Eutrophication ◽  
Viable Seeds

Abstract Studying the effects of fertilisation on the seed production of grassland species can help understand the vegetation changes and biodiversity losses due to soil eutrophication. On a temperate hay-meadow, the seed production of fifteen grasses and seventeen forbs was studied under three fertilisation treatments: 0-0-0, 0-54-108 and 192-108-216 kg N, P2O5 and K2O respectively, per year. Fertile shoots collected at the seed maturation stage were analysed for all main traits of the gamic reproduction. On average, forbs produced more ovules and viable seeds per shoot (199 and 65, respectively) than grasses (112 and 35, respectively). Fertilisation increased the number of inflorescences per shoot in both grasses and forbs and had a limited but variable effect on germinability and viability in the two functional groups: viability increased in grasses but often decreased in forbs. This pattern resulted in 55% and 11% increases in viable seed production in grasses and forbs, respectively. At the higher level of fertilisation, shoot density was positively related to the number of viable seeds per shoot in grasses and to the seed size in forbs. Higher grass seed dormancy likely allowed for later grass seed germination in autumn when vegetation cover was low, contributing to the dominance of a few light-seeded nutrient-demanding grasses and poor forb number in fertilised meadows.

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