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fertility and sterility

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https://www.readbyqxmd.com/read/27919924/gradual-vs-abrupt-reduction-of-carpels-in-syncarpous-gynoecia-a-case-study-from-polyscias-subg-arthrophyllum-araliaceae-apiales
#1
Polina V Karpunina, Alexei A Oskolski, Maxim S Nuraliev, Porter P Lowry, Galina V Degtjareva, Tahir H Samigullin, Carmen M Valiejo-Roman, Dmitry D Sokoloff
PREMISE OF THE STUDY: Revealing the relative roles of gradual and abrupt transformations of morphological characters is an important topic of evolutionary biology. Gynoecia apparently consisting of one carpel have evolved from pluricarpellate syncarpous gynoecia in several angiosperm clades. The process of reduction can involve intermediate stages, with one fertile and one or more sterile carpels (pseudomonomery). The possible origin of monomery directly via an abrupt change of gynoecium merism has been a matter of dispute...
December 5, 2016: American Journal of Botany
https://www.readbyqxmd.com/read/27907023/field-trials-reveal-ecotype-specific-responses-to-mycorrhizal-inoculation-in-rice
#2
Abdala Gamby Diedhiou, Fatou Kine Mbaye, Daouda Mbodj, Mathieu Ndigue Faye, Sarah Pignoly, Ibrahima Ndoye, Koffi Djaman, Souleymane Gaye, Aboubacry Kane, Laurent Laplaze, Baboucarr Manneh, Antony Champion
The overuse of agricultural chemicals such as fertilizer and pesticides aimed at increasing crop yield results in environmental damage, particularly in the Sahelian zone where soils are fragile. Crop inoculation with beneficial soil microbes appears as a good alternative for reducing agricultural chemical needs, especially for small farmers. This, however, requires selecting optimal combinations of crop varieties and beneficial microbes tested in field conditions. In this study, we investigated the response of rice plants to inoculation with arbuscular mycorrhizal fungi (AMF) and plant growth promoting bacteria (PGPB) under screenhouse and field conditions in two consecutive seasons in Senegal...
2016: PloS One
https://www.readbyqxmd.com/read/27905146/temporal-changes-in-serum-luteinizing-hormone-following-ovariohysterectomy-and-gonadotropin-releasing-hormone-vaccination-in-domestic-cats
#3
H L Bateman, L M Vansandt, J Newsom, W F Swanson
Measurement of circulating luteinizing hormone (LH) concentrations in cats and temporal changes following ovariohysterectomy (OHE) or possibly GnRH vaccination may be informative for assessing their fertility, contraception or sterilization status. In this study, serum LH concentrations were measured in domestic cats (n = 6) immediately prior to and up to 120 days post-OHE. Basal LH concentrations of females previously subjected to OHE (n = 4; ~1.5 years post-OHE) were compared pre- and post-vaccination with a GnRH immunocontraceptive, and to LH concentrations in intact females...
November 30, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27904810/a-preliminary-identification-of-rf-a619-a-novel-restorer-gene-for-cms-c-in-maize-zea-mays-l
#4
Liu Yongming, Zhao Zhuofan, Lu Yanli, Li Chuan, Wang Jing, Dong Boxiao, Liang Bing, Qiu Tao, Zeng Wenbing, Cao Moju
C-type cytoplasmic male sterility (CMS-C) is widely utilized for hybrid maize seed production. However, genetic mechanisms underlying the fertility restoration are very complicated. At present, there is a divergence on the number of fertility restorer genes in maize inbred line A619 for CMS-C. To further elucidate the restoring mechanism of A619, we used genetic analysis and molecular markers to confirm the restorer genes of maize inbred line A619 for C-type male sterile line C48-2 in this study. Firstly, the fertility segregations of (C48-2 × A619)F2 populations were investigated under three environments during 2013-2015...
2016: PeerJ
https://www.readbyqxmd.com/read/27900719/changes-of-soil-bacterial-activities-and-functions-after-different-n-additions-in-a-temperate-forest
#5
Peng Guo, Tiwen Han, Li Zhang, Shushan Li, Dongzhu Ma, Yuhan Du
It has been shown that different nitrogen (N) addition led to various influences on soil microbial activities in forest ecosystems; however, the changes of bacteria were still unclear. In this work, inorganic N (NH4NO3) and organic N (urea and glycine) were fertilized with different ratios (5:0, 1:4, 3:2, 2:3, and 1:4) on temperate forest soils, while fungicide (cycloheximide) was simultaneously added on half of each treatment to inhibit fungal activities (leaving only bacteria). After a 3-year field experiment, soil samples were harvested, then microbial enzymatic activities involved in carbon (C), and N and phosphorus (P) cycles were determined...
November 30, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27900615/good-manufacturing-practice-requirements-for-the-production-of-tissue-vitrification-and-warming-and-recovery-kits-for-clinical-research
#6
Monica M Laronda, Kelly E McKinnon, Alison Y Ting, Ann V Le Fever, Mary B Zelinski, Teresa K Woodruff
Products that are manufactured for use in a clinical trial, with the intent of gaining US Food and Drug Administration (FDA) approval for clinical use, must be produced under an FDA approved investigational new drug (IND) application. We describe work done toward generating reliable methodology and materials for preserving ovarian cortical tissue through a vitrification kit and reviving this tissue through a warming and recovery kit. We have described the critical steps, procedures, and environments for manufacturing products with the intent of submitting an IND...
November 30, 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27896366/allelism-analysis-of-brrfp-locus-in-different-restorer-lines-and-map-based-cloning-of-a-fertility-restorer-gene-brrfp1-for-pol-cms-in-chinese-cabbage-brassica-rapa-l
#7
Huamin Zhang, Junqing Wu, Zihui Dai, Meiling Qin, Lingyu Hao, Yanjing Ren, Qingfei Li, Lugang Zhang
In Chinese cabbage, there are two Rf loci for pol CMS and one of them was mapped to a 12.6-kb region containing a potential candidate gene encoding PPR protein. In Chinese cabbage (Brassica rapa), polima cytoplasmic male sterility (pol CMS) is an important CMS type and is widely used for hybrid breeding. By extensive test crossing in Chinese cabbage, four restorer lines (92s105, 01s325, 00s109, and 88s148) for pol CMS were screened. By analyzing the allelism of the four restorer lines, it was found that 92s105, 01s325, and 00s109 had the same "restorers of fertility" (Rf) locus (designated as BrRfp1), but 88s148 had a different Rf locus (designated as BrRfp2)...
November 28, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27892642/new-approaches-to-non-surgical-sterilization-for-dogs-and-cats-opportunities-and-challenges
#8
Linda Rhodes
Over the last 40 years, researchers have explored methods to non-surgically suppress fertility in animals. Immunocontraception has been used to control wildlife populations but does not confer long-term immunity. The gonadotropin-releasing hormone (GnRH) agonist deslorelin, formulated as an implant to provide 6-month to 1-year suppression of fertility in male dogs, is available commercially in some countries. Neither of these approaches provide permanent sterility. A single-dose, permanent treatment would be a valuable tool in dog and cat population control...
November 28, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27886257/an-evolutionary-conserved-interaction-between-the-gcm-transcription-factor-and-the-sf1-nuclear-receptor-in-the-female-reproductive-system
#9
Pierre B Cattenoz, Claude Delaporte, Wael Bazzi, Angela Giangrande
NR5A1 is essential for the development and for the function of steroid producing glands of the reproductive system. Moreover, its misregulation is associated with endometriosis, which is the first cause of infertility in women. Hr39, the Drosophila ortholog of NR5A1, is expressed and required in the secretory cells of the spermatheca, the female exocrine gland that ensures fertility by secreting substances that attract and capacitate the spermatozoids. We here identify a direct regulator of Hr39 in the spermatheca: the Gcm transcription factor...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27883303/transgender-reproductive-choice-and-fertility-preservation
#10
Khadija Mitu
Increasing numbers of young transgender people are now using medical technologies to achieve a physical gender transition. However, the procedures of physical gender transition might cause temporary or permanent sterility. Thus many transgender people are now using fertility preservation technologies. Nonetheless, they can experience dilemmas in making reproductive and family-building decisions and face challenges in gaining access to and utilizing fertility preservation services. Based on qualitative research conducted with transgender men and women who used reproductive technologies for preserving their fertility before or during their physical transition, this paper contributes to the discourse of reproductive choice by the inclusion of transgender people's experience...
November 1, 2016: AMA Journal of Ethics
https://www.readbyqxmd.com/read/27872859/mapping-qtls-for-fertility-restoration-of-different-cytoplasmic-male-sterility-types-in-rice-using-two-oryza-sativa-%C3%A3-o-rufipogon-backcross-inbred-line-populations
#11
Biao-Lin Hu, Jian-Kun Xie, Yong Wan, Jin-Wei Zhang, Fan-Tao Zhang, Xia Li
Hybrid rice breeding using cytoplasmic male sterility/fertility restoration (CMS/Rf) systems plays an important role in ensuring global food security. Two backcross inbred line (BIL) populations derived from either Xieqingzao B (XB)//XB/Dongxiang wild rice (DWR) (XXD) or XB//DWR/XB (XDX) were used to detect quantitative trait loci (QTLs) for fertility restoration of Dwarf wild abortive- (DA-), Indonesia Paddy- (ID-), and DWR-type CMS in rice. Lines with ID- and DA-type CMS were testcrossed with both the XXD- and XDX-BILs, while the line with DWR-type CMS was testcrossed with the XDX-BILs only...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27871243/osacos12-an-orthologue-of-arabidopsis-acyl-coa-synthetase5-plays-an-important-role-in-pollen-exine-formation-and-anther-development-in-rice
#12
Yueling Li, Dandan Li, Zongli Guo, Qiangsheng Shi, Shuangxi Xiong, Cheng Zhang, Jun Zhu, Zhongnan Yang
BACKGROUND: Sporopollenin is a major component of the pollen exine pattern. In Arabidopsis, acyl-CoA synthetase5 (ACOS5) is involved in sporopollenin precursor biosynthesis. In this study, we identified its orthologue, OsACOS12, in rice (Oryza sativa) and compared the functional conservation of ACOS in rice to Arabidopsis. RESULTS: Sequence analysis showed that OsACOS12 shares 63.9 % amino acid sequence identity with ACOS5. The osacos12 mutation caused by a pre-mature stop codon in LOC_Os04g24530 exhibits defective sexine resulting in a male sterile phenotype in rice...
November 21, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/27870312/mixed-pollen-load-and-late-acting-self-incompatibility-flexibility-in-adenocalymma-peregrinum-miers-l-g-lohmann-bignonieae-bignoniaceae
#13
Mariana Oliveira Duarte, Clesnan Mendes-Rodrigues, Mariana Ferreira Alves, Paulo Eugênio Oliveira, Diana Salles Sampaio
Mixed cross and self-pollen load in the stigma (mixed pollination) in species with late-acting self-incompatibility system (LSI) can lead to self-fertilized seed production. This "cryptic self-fertility" may allow selfed seedling development in populations of otherwise largely self-sterile species. Our aims were to check if mixed pollinations would lead to fruit set in LSI Adenocalymma peregrinum, and test for evidence of early-acting inbreeding depression in putative selfed seeds from mixed pollinations. Experimental pollinations and tests for germination were carried out in a natural population...
November 21, 2016: Plant Biology
https://www.readbyqxmd.com/read/27867107/draft-genome-sequence-of-mentha-longifolia-l-and-development-of-resources-for-mint-cultivar-improvement
#14
Kelly J Vining, Sean R Johnson, Amirhossein Ahkami, Iris Lange, Amber N Parrish, Susan C Trapp, Rodney B Croteau, Shannon C K Straub, Iovanna Pandelova, B Markus Lange
The genus Mentha encompasses species cultivated for their essential oils, which are formulated into a vast array of consumer products. Desirable oil characteristics and resistance to the fungal disease Verticillium wilt are top priorities for the mint industry. However, cultivated mints have complex polyploid genomes and are sterile. Breeding efforts, therefore, require the development of genomic resources for fertile mint species. Here, we present draft de novo genome and plastome assemblies for a wilt-resistant South African accession of Mentha longifolia (L...
November 17, 2016: Molecular Plant
https://www.readbyqxmd.com/read/27865529/application-of-acclimated-sewage-sludge-as-a-bio-augmentation-bio-stimulation-strategy-for-remediating-chlorpyrifos-contamination-in-soil-with-without-cadmium
#15
Can Wang, Zhiren Zhou, Hongdan Liu, Junjie Li, Ying Wang, Heng Xu
This experiment was performed to investigate the effects of acclimated sewage sludge (ASS) and sterilized ASS on the fates of chlorpyrifos (CP) in soil with or without cadmium (Cd), as well as the improvement of soil biochemical properties. Results showed that both ASS and sterilized ASS could significantly promote CP dissipation, and the groups with ASS had the highest efficiency on CP removal, whose degradation rates reached 71.3%-85.9% at the 30th day (40.4%-50.2% higher than non-sludge groups). Besides, the degradation rate of CP was not severely influenced by the existence of Cd, and the population of soil microorganism dramatically increased after adding sludge...
November 16, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27864513/construction-of-a-male-sterility-system-for-hybrid-rice-breeding-and-seed-production-using-a-nuclear-male-sterility-gene
#16
Zhenyi Chang, Zhufeng Chen, Na Wang, Gang Xie, Jiawei Lu, Wei Yan, Junli Zhou, Xiaoyan Tang, Xing Wang Deng
The breeding and large-scale adoption of hybrid seeds is an important achievement in agriculture. Rice hybrid seed production uses cytoplasmic male sterile lines or photoperiod/thermo-sensitive genic male sterile lines (PTGMS) as female parent. Cytoplasmic male sterile lines are propagated via cross-pollination by corresponding maintainer lines, whereas PTGMS lines are propagated via self-pollination under environmental conditions restoring male fertility. Despite huge successes, both systems have their intrinsic drawbacks...
November 18, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27859771/engineering-a-gene-silencing-viral-construct-that-targets-the-cat-hypothalamus-to-induce-permanent-sterility-an-update
#17
G A Dissen, K Adachi, A Lomniczi, T Chatkupt, B L Davidson, H Nakai, S R Ojeda
The intent of this contribution is to provide an update of the progress we have made towards developing a method/treatment to permanently sterilize cats. Our approach employs two complementary methodologies: RNA interference (RNAi) to silence genes involved in the central control of reproduction and a virus-based gene therapy system intended to deliver RNAi selectively to the hypothalamus (where these genes are expressed) via the systemic administration of modified viruses. We selected the hypothalamus because it contains neurons expressing Kiss1 and Tac3, two genes essential for reproduction and fertility...
November 17, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27853306/osr1-and-spak-cooperatively-modulate-sertoli-cell-support-of-mouse-spermatogenesis
#18
Yung-Liang Liu, Sung-Sen Yang, Shyi-Jou Chen, Yu-Chun Lin, Chin-Chen Chu, Hsin-Hui Huang, Fung-Wei Chang, Mu-Hsien Yu, Shih-Hua Lin, Gwo-Jang Wu, Huey-Kang Sytwu
We investigated the role of oxidative stress-responsive kinase-1 (OSR1) and STE20 (sterile 20)/SPS1-related proline/alanine-rich kinase (SPAK), upstream regulators of the Na(+)-K(+)-2Cl(-) cotransporter (NKCC1)-essential for spermatogenesis-in mouse models of male fertility. Global OSR1(+/-) gene mutations, but not global SPAK(-/-) or Sertoli cell (SC)-specific OSR1 gene knockout (SC-OSR1(-/-)), cause subfertility with impaired sperm function and are associated with reduced abundance of phosphorylated (p)-NKCC1 but increased p-SPAK expression in testicular tissue and spermatozoa...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27844189/characterization-of-bcmf23a-and-bcmf23b-two-putative-pectin-methylesterase-genes-related-to-pollen-development-in-brassica-campestris-ssp-chinensis
#19
Sue Lin, Li Huang, Xiaolin Yu, Xingpeng Xiong, Xiaoyan Yue, Tingting Liu, Ying Liang, Meiling Lv, Jiashu Cao
Two homologous genes, Brassica campestris Male Fertility 23a (BcMF23a) and Brassica campestris Male Fertility 23b (BcMF23b), encoding putative pectin methylesterases (PMEs) were isolated from Brassica campestris ssp. chinensis (syn. Brassica rapa ssp. chinensis). These two genes sharing high sequence identity with each other were highly expressed in the fertile flower buds but silenced in the sterile ones of genic male sterile line system ('Bcajh97-01A/B'). Results of RT-PCR and in situ hybridization suggested that BcMF23a and BcMF23b were pollen-expressed genes, whose transcripts were first detected at the binucleate pollen and maintained throughout to the mature pollen grains...
November 14, 2016: Molecular Biology Reports
https://www.readbyqxmd.com/read/27842996/the-varicocele-as-related-to-fertility
#20
EDITORIAL
Martin Kathrins
Brown JS, Dubin L, Hotchkiss RS. The varicocele as related to fertility. Fertil Steril 1967;18:46-56. "The fact that some men with varicoceles are fertile should not minimize the potentially detrimental role of this abnormality. It would be reasonable to claim that varicocele is uniformly detrimental. One might postulate that a fertile man with a varicocele would have better semen without this condition."
November 11, 2016: Fertility and Sterility
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