Pollen analysis
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Astrocaryum aculeatum is a palm tree species native to the tropical regions of South America, exploited commercially by local farmers for the pulp extracted from its fruits. The objective of this research was to compare the genetic diversity between adult plants and seedlings from open-pollinated seeds, quantify the pollen flow and dispersal, the spatial genetic structure, and the effective size of a population that has been continuously harvested for its fruits.
10p vinarcissa 21-03-2023 5 1 Download
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Royal jelly (RJ) is reflecting the flora around the apiaries as a result of the foraging activity of honeybees and therefore, pollen analysis could be used to verify its botanical/geographical origin. Colon cancer treatment by means of chemotherapeutics agents reflects a substantial problem for the organism due to high toxicity to other viable cells of the body. To explore a chemopreventive approach to enhancing colon cancer treatment efficacy, the antioxidant and antiproliferative effects of RJ in HT-29 colon cancer cells were assessed.
11p lyhuyenthu 31-01-2023 7 1 Download
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The separation of ten flavanones (flavanone, 2 -hydroxyflavanone, 4’-hydroxyflavanone, 6- hydroxyflavanone, 7-hydroxyflavanone, naringenin, naringin, hesperetin, pinostrobin, and taxifolin) using supercritical fluid chromatography and considering achiral and chiral approaches has been studied in this work.
12p vironald 15-12-2022 7 2 Download
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This study researched atmospheric pollen from Mersin Province using the volumetric method between in 2016 and 2017. The daily, weekly, monthly, and annual distribution of the pollen obtained during the study was identified. The relationship between pollen and meteorological factors was researched using Spearman’s rho analysis. During the two-year study, 32,336 pollen grains/m3 from 40 different taxa [22 trees, 1 grass (Poaceae), and 17 other weeds] were identified. Of the total pollen, 82% belonged to trees, 6.8% to grasses, 11% to other weeds, and unidentified taxa accounted for 0.2%.
13p tudichquannguyet 29-11-2021 5 0 Download
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Palynological characters of 20 taxa belonging to the Turkish subgenus Cyanus were studied in details using light and scanning electron microscopy. Pollen grains of the subgenus Cyanus were tricolporate or syncolporate, subprolate or prolate-spheroidal, 26.15 to 53 µm in polar size, 22.84 to 46.86 µm in equatorial size, isopolar, and radially symmetrical. The only type of pollen grain ornamentation observed was scabrate-perforate. Principal component analysis and cluster analysis were performed to investigate the relationships of the studied Cyanus taxa.
16p tudichquannguyet 29-11-2021 12 1 Download
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Transcriptomic analysis between self- and cross-pollinated pistils of tea plants (Camellia sinensis)
Self-incompatibility (SI) is a major barrier that obstructs the breeding process in most horticultural plants including tea plants (Camellia sinensis). The aim of this study was to elucidate the molecular mechanism of SI in tea plants through a high throughput transcriptome analysis.
12p vibeauty 23-10-2021 5 1 Download
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COI (CORONATINE INSENSITIVE), an F-box component of the Skp1-Cullin-F-box protein (SCFCOI1) ubiquitin E3 ligase, plays important roles in the regulation of plant growth and development. Recent studies have shown that COIs are involved in pollen fertility. In this study, we identified and characterized COI genes in the wheat genome and analyzed expression patterns under abiotic stress.
17p vitzuyu2711 29-09-2021 15 1 Download
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Pectin is a major component and structural polysaccharide of the primary cell walls and middle lamella of higher plants. Pectate lyase (PEL, EC 4.2.2.2), a cell wall modification enzyme, degrades de-esterified pectin for cell wall loosening, remodeling and rearrangement. Nevertheless, there have been few studies on PEL genes and no comprehensive analysis of the PEL gene family in cotton.
14p vitzuyu2711 29-09-2021 7 1 Download
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Cytoplasmic male sterility (CMS) is a natural phenomenon of pollen abortion caused by the interaction between cytoplasmic genes and nuclear genes. CMS is a simple and effective pollination control system, and plays an important role in crop heterosis utilization.
14p vitzuyu2711 29-09-2021 16 1 Download
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Genic male sterility (GMS) line is an important approach to utilize heterosis in Brassica rapa, one of the most widely cultivated vegetable crops in Northeast Asia. However, the molecular genetic mechanisms of GMS remain to be largely unknown.
23p visilicon2711 20-08-2021 11 1 Download
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Cytoplasmic male sterility (CMS) and its restoration of fertility (Rf) system is an important mechanism to produce F1 hybrid seeds. Understanding the interaction that controls restoration at a molecular level will benefit plant breeders. The CMS is caused by the interaction between mitochondrial and nuclear genes, with the CMS phenotype failing to produce functional anthers, pollen, or male gametes.
17p viansan2711 30-07-2021 14 1 Download
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Proline-rich extension-like receptor protein kinases (PERKs) are an important class of receptor kinases located in the plasma membrane, most of which play a vital role in pollen development.
13p vijeeni2711 24-07-2021 11 0 Download
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Male sterility (MS) has important applications in hybrid seed production, and the abortion of anthers has been observed in many plant species. While most studies have focused on the genetic factors affecting male sterility, the dynamic gene expression patterns of pollen abortion in male sterile lines have not been fully elucidated.
16p vijichea2711 28-05-2021 7 1 Download
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Male sterility is an efficient trait for hybrid seed production and germplasm innovation. Until now, most studies on male sterility were on cytoplasmic and recessive genic sterility, with few on dominant genic male sterility, especially in cotton, due to lack of such mutant.
14p vijichea2711 28-05-2021 10 1 Download
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Palynological studies of pollen loads were carried out to determine the pollen sources for bumble bees under mid-hill conditions of Himachal Pradesh during 2016. The pollen loads were collected from queens and workers of B. haemorrhoidalis captured with the help of an insect net and then were released.
13p caygaocaolon8 07-11-2020 9 2 Download
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Gene action for various quantitative and qualitative traits was explored in a half diallel involving seven elite inbred lines. Variance/Co-variance graphs revealed that the yield potential traits like (days to 50% pollen shed, days to 75% brown husk, plant height ear placement height, ear length, kernel rows per ear, kernel per row, test weight and grain yield,) displayed that the intercept of the regression line was negative showing over dominance type of gene action.
7p chauchaungayxua8 03-10-2020 12 1 Download
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The Ma river delta located in the North Central of VietNam is the third largest ones in Vietnam following the Mekong Delta and the Red River Delta. However, there are not many researches on sedimentary. This study aims to determine the Characteristics of the Holocene sedimentary facies in coastal plain of the Song Ma Delta based on observation of sedimentary structure and analysis of grain size, diatom, flora, pollen and 14C dating collected for the drill core (LKTH2 borehole) from the coastal plain of the Song Ma river delta.
11p nguyentanloc09 17-10-2020 10 0 Download
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The experimental was carried out at Indian Institute of Rice Research Farm, ICRISAT, Patencheru, Hyderabad, Telangana, India, during Rabi, 2014-2015 in order to estimate genetic variability, heritability and genetic advance in two hundred genotypes of rice. Analysis of variance revealed highly significant differences among the genotypes for all the characters indicating sufficient variability existed in the present material selected for the study.
9p nguaconbaynhay6 23-06-2020 16 1 Download
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The estimates of genotypic correlation coefficients in general were higher than their corresponding phenotypic correlation coefficients indicating strong inherent association among the traits. The seed yield per plant had significant and positive association with number of primary branches plant-1, number of secondary branches plant-1 , number of pods plant-1 , number of seeds plant-1 , biological yield plant-1 , seed yield (kg/ha) harvest index and 100-seed weight at both genotypic as well as phenotypic levels.
7p gaocaolon5 14-06-2020 20 1 Download
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The experiment was conducted to assess efficiency of pollen storage methods in sunflower by using the parental lines of sunflower hybrid APSH-66. The trial was laid out in a randomized block design with three replications and eight treatments. Analysis of variance revealed that treatment effects were significant for characters such as number of filled seeds per head, seed set (%), seed husk ratio and seed yield per plant.
4p cothumenhmong5 17-05-2020 13 0 Download