scholarly journals Antecological features of Rubus odoratus L. during introduction in the North

Author(s):  
S. A. Miftakhova

The article describes the peculiarities of flowering and pollination of an introduced sample of Rubus odoratus in the conditions of the North (Komi Republic). Experiments on controlled pollination have shown that the species is characterized by xenogamy, although there was also idiogamy. The fruits formed through idiogamy had many voids between the drupes, often did not reach maturity, and the seeds were dissimilar. Dichogamy in the form of protandria and partial hercogamy are not an obstacle, but only additional factors that prevent self-pollination. The probable cause of self-sterility is self-incompatibility. R. odoratus has no specific pollination strategy. The main method of pollination of the species is entomophilia, carried out by pollinating insects mainly representatives of three orders: Coleoptera, Diptera and Hymenoptera. R. odoratus is characterized by visual and olfactory attraction.

2019 ◽  
Vol 17 (3) ◽  
pp. e0804 ◽  
Author(s):  
Elham Aslmoshtaghi ◽  
Ali Reza Shahsavar ◽  
Majid Talebi ◽  
Aziz Dazeh

Aim of study: To determine compatibility relationships and select suitable pollinizers for two olive (Olea europaea L.) cultivars (‘Amygdalolia’ and ‘Konservalia’).Area of study: The Kazeroun Olive Research Station, Fars, Iran.Material and methods: Emasculated flowers from ‘Amygdalolia’ and ‘Konservalia’ cultivars were treated with self-pollination, open-pollination, and cross-pollination with pollen from cultivars such as ‘Dacal’, ‘Amygdalolia’,‘Konservalia’, ‘Koroniki’, and ‘Manzanilla’. Controlled pollination, pollen tube growth, and molecular analysis were employed.Main results: Controlled pollination, pollen tube growth, and molecular analysis showed that cross-pollination was beneficial for ‘Amygdalolia’ compared to self-pollination. The results showed that this cultivar is self-incompatible, and its best pollinator is the ‘Dacal’ cultivar. Experiment results indicated that ‘Konservalia’ behaves as a self-compatible cultivar. The highest fruit percentage and higher pollen tube growth rates were found in self-pollination treatments. Molecular attempts to isolate candidates for sporophytic self-incompatibility (SSI) led the researchers to analyze the expression of SRK and SLG genes.Research highlights: The results indicated an antagonist transcriptional expression pattern in the flowers of ‘Amygdalolia’, classified as a self-incompatible cultivar, and ‘Konservalia’, classified as a self-compatible cultivar, for the SRK and SLG genes.


2011 ◽  
pp. 101-116 ◽  
Author(s):  
B. Yu. Teteryuk

The results of a sintaxonomical study of plant communities of the Yamozero lake (the North-East of the European part of Russia) are presented. The diversity of the aquatic and helophytic vegetation of the Yamozero lake consists of 16 associations and 2 communities of 6 unions, 4 orders and 2 classes of the floristic classification: Potamogetonetea (7 associations, 2 communities), Phragmito-Magnocaricetea (9 associations). Many of described associations are widely distributed in the Central and the Eastern Europe. Some associations have the boundaries of their ranges. Some communities include 2 rare species of regional level: Isoetes setacea and Sagittaria natans.


2018 ◽  
pp. 149-154

Vera Antonovna Martynenko (17.02.1936–06.01.2018) — famous specialist in the field of studying vascular plant flora and vegetation of the Far North, the Honored worker of the Komi Republic (2006), The Komi Republic State Scientific Award winner (2000). She was born in the town Likhoslavl of the Kali­nin (Tver) region. In 1959, Vera Antonovna graduated from the faculty of soil and biology of the Leningrad State University and then moved to the Komi Branch of USSR Academy of Science (Syktyvkar). From 1969 to 1973 she passed correspondence postgraduate courses of the Komi Branch of USSR Academy of ­Science. In 1974, she received the degree of candidate of biology (PhD) by the theme «Comparative analysis of the boreal flora at the Northeast European USSR» in the Botanical Institute (St. Petersburg). In 1996, Vera Antonovna received the degree of doctor of biology in the Institute of plant and animal ecology (Ekaterinburg) «Flora of the northern and mid subzones of the taiga of the European North-East». The study and conservation of species and coenotical diversity of the plant world, namely the vascular plants flora of the Komi Republic and revealing its transformation under the anthropogenic influence, was in the field of V. A. Martynenko’ scientific interests. She made great contribution to the study of the Komi Republic meadow flora and the pool of medi­cinal plants. She performed inventorying and mapping the meadows of several agricultural enterprises of the Republic, revealed the species composition and places for harvesting medicinal plants and studied their productivity in the natural flora of the boreal zone. The results of her long-term studies were used for making the NPA system and the Red Book of the Komi Republic (1998 and 2009). Vera Antonovna participated in the research of the influence of placer gold mining and oil development on the natural ecosystems of the North, and developed the method of long-term monitoring of plant cover. Results of these works are of high practical value. V. A. Martynenko is an author and coauthor of more than 130 scientific publications. The most important jnes are «Flora of Northeast European USSR» (1974, 1976, and 1977), «Floristic composition of fodder lands of the Northeast Europe» (1989), «The forests of the Komi Republic» (1999), «Forestry of forest resources of the Komi Republic» (2000), «The list of flora of the Yugyd va national park» (2003), «The guide for vascular plants of the Syktyvkar and its vicinities» (2005), «Vascular plants of the Komi Republic» (2008), and «Resources of the natural flora of the Komi Republic» (2014). She also was an author of «Encyclopedia of the Komi Republic» (1997, 1999, and 2000), «Historical and cultural atlas of the Komi Republic» (1997), «Atlas of the Komi Republic» (2001, 2011). V. A. Martynenko made a great contribution to the development of the botanical investigations in the North. Since 1982, during more than 10 years, she was the head of the Department of the Institute of Biology. Three Ph. D. theses have been completed under her leadership. Many years, she worked actively in the Dissertation Council of the Institute of biology Komi Scientific Centre UrB RAS.  The death of Vera Antonovna Martynenko is a heavy and irretrievable loss for the staff of the Institute of Biology. The memory of Vera Antonovna will live in her numerous scientific works, the hearts of students and colleagues.


Genes ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 432
Author(s):  
Yaling Chen ◽  
Benchang Hu ◽  
Fantao Zhang ◽  
Xiangdong Luo ◽  
Jiankun Xie

Dendrobium officinale is a rare and traditional medicinal plant with high pharmacological and nutritional value. The self-incompatibility mechanism of D. officinale reproductive isolation was formed in the long-term evolution process, but intraspecific hybridization of different germplasm resources leads to a large gap in the yield, quality, and medicinal value of D. officinale. To investigate the biological mechanism of self-incompatibility in D. officinale, cytological observation and the transcriptome analysis was carried out on the samples of self-pollination and cross-pollination in D. officinale. Results for self-pollination showed that the pollen tubes could grow in the style at 2 h, but most of pollen tubes stopped growing at 4 h, while a large number of cross-pollinated pollen tubes grew along the placental space to the base of ovary, indicating that the self-incompatibility of D. officinale may be gametophyte self-incompatibility. A total of 63.41 G basesum of D. officinale style samples from non-pollinated, self-pollination, and cross-pollination by RNA-seq were obtained, and a total of 1944, 1758, and 475 differentially expressed genes (DEGs) in the comparison of CK (non-pollinated) vs. HF (cross-pollination sample), CK vs. SF (self-pollination sample) and SF vs. HF were identified, respectively. Forty-one candidate genes related to self-incompatibility were found by function annotation of DEGs, including 6 Ca2+ signal genes, 4 armed repeat containing (ARC) related genes, 11 S-locus receptor kinase (SRK) related genes, 2 Exo70 family genes, 9 ubiquitin related genes, 1 fatty acid related gene, 6 amino acid-related genes, 1 pollen-specific leucine-rich repeat extensin-like protein (LRX) related gene and 1 lectin receptor-like kinases (RLKs) related gene, showed that self-incompatibility mechanism of D. officinale involves the interaction of multiple genes and pathways. The results can provide a basis for the study of the self-incompatibility mechanism of D. officinale, and provide ideas for the preservation and utilization of high-quality resources of D. officinale.


1976 ◽  
Vol 54 (22) ◽  
pp. 2530-2535 ◽  
Author(s):  
Fred R. Ganders

Stigmatic pollen loads were analyzed from naturally pollinated pin and thrum form flowers of Amsinckia douglasiana and A. vernicosa var. furcata. Pin stigmas captured more total pollen than thrum stigmas. Pins experienced either net self-pollination or random pollination. Thrum stigmas experienced significant disassortative pollination. Comparing pollen loads from intact and emasculated thrum flowers of A. douglasiana indicated that self-pollination and geitonogamy were relatively unimportant in the pollination of the thrum form. The level of disassortative pollination of A. vernicosa var. furcata does not appear to be high enough to account for the level of disassortative mating observed by progeny testing, suggesting that this species may possess an incomplete stylar self-incompatibility system such as has been reported in A. grandiflora.


2021 ◽  
Vol 10 (3) ◽  
pp. 112-116
Author(s):  
Olga Valerievna Skrotskaya ◽  
Vasiliy Vitalyevich Punegov

The paper presents data on the study of the content of carotenoids in plant fruits of different Sorbus species and varieties when introduced in the Komi Republic. As a result of a biochemical analysis, the accumulation of various amounts of carotenoids has been revealed: from 2,6 to 43 mg/%, depending on the species, sample and variety. The author compared the content of this group of substances in raw materials of plants introduced in the Komi Republic with the ones growing in other regions of Russia (Republic of Bashkortostan, Republic of Mordovia, Saratov, Penza, Moscow Region and others). It has been shown that under northern conditions in rowan fruits the value of the total carotenoids prevails in representatives of the Sorbus section with an East Asian range ( S. pohuashanensis , S. discolor , S. amurensis ), except the Far Eastern species S. sambucifolia . A different content of carotenoids in the plant fruits of S. aucuparia samples has been established: the maximum is in the sample from Yoshkar-Ola, which is 3-5 times higher than that in S. aucuparia from the Komi Republic. The content of this group of substances in the rowan fruits of the three studied varieties (Businka, Rubinovaya and Sorbinka) has been determined; their predominance in the Sorbinka variety has been shown. The study of the biochemical composition of plant raw materials of mountain ash species and varieties with the highest content of carotenoids when introduced in the North should be continued in order to further assess its qualitative composition and to develop recommendations for its use as a medicinal product, as well as a source of functional ingredients for pharmaceutical and food industries.


1990 ◽  
Vol 17 (1) ◽  
pp. 22-24 ◽  
Author(s):  
Donald J. Banks

Abstract In trials conducted in the greenhouse, growth chamber, and outdoors, no pegs or pods were produced when A. lignosa (Chod. et Hassl.) Krap. et Greg. nom. nud. plants were allowed to pollinate naturally. However, hand tripping flowers, especially in the greenhouse, resulted in significant increases in pod production. The results suggest that the high degree of reproductive sterility usually noted for A. lignosa in culture is due to pollination failure rather than to physiological self incompatibility. The somewhat truncated shape of the stigma and its elevated position relative to the anthers probably restricts natural self-pollination without the aid of pollinating vectors such as bees.


1980 ◽  
Vol 58 (6) ◽  
pp. 712-716 ◽  
Author(s):  
Shirley Dobrofsky ◽  
W. F. Grant

Self-incompatibility, a prefertilization event, and self-sterility, a postfertilization event, have both been suggested as causes for differences in seed set between cross- and self-pollinated florets in Lotus corniculatus L. Ovary protein subunits of selfed, crossed, and unpollinated florets of L. corniculatus cv. Mirabel were studied using polyacrylamide gel electrophoresis. Banding patterns differed for all three conditions. Ovary protein differences were found prior to the time fertilization is known to occur, thereby providing evidence that self-incompatibility is at least partially responsible for the reduced seed set after self-pollination.


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