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fertility and sterility

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https://www.readbyqxmd.com/read/28724622/transcription-factor-myb26-is-key-to-spatial-specificity-in-anther-secondary-thickening-formation
#1
Caiyun Yang, Jie Song, Alison Ferguson, Doris Klisch, Kim Simpson, Rui Mo, Benjamin Taylor, Zoe A Wilson
Successful fertilisation relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical for anther dehiscence and fertility. Here we show that the although the MYB26 transcript shows expression in multiple floral organs the MYB26 protein is localised specifically to the anther endothecium nuclei and that it directly regulates two NAC domain genes, NST1 and NST2, which are critical for the induction of secondary thickening biosynthesis genes...
July 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28712045/dynamics-of-soil-bacterial-communities-over-a-vegetation-season-relate-to-both-soil-nutrient-status-and-plant-growth-phenology
#2
Davide Francioli, Elke Schulz, François Buscot, Thomas Reitz
Soil microorganisms regulate element cycling and plant nutrition, mediate co-existence of neighbors, and stabilize plant communities. Many of these effects are dependent upon environmental conditions and, in particular, on nutrient quality and availability in soils. In this context, we set up a pot experiment in order to examine the combined effects of soil nutrient availability and microbial communities on plant-soil interactions and to investigate assemblage rules for soil bacterial communities under changed nutrient conditions...
July 15, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28706525/functional-marker-assisted-improvement-of-stable-cytoplasmic-male-sterile-lines-of-rice-for-bacterial-blight-resistance
#3
Jegadeesan Ramalingam, Palanisamy Savitha, Ganesh Alagarasan, Ramasamy Saraswathi, Ranganathan Chandrababu
Bacterial blight (BB), caused by Xanthomonas oryzae pv.oryzae is one among the major diseases in rice, which in severe condition cause losses up to 60% in total yield. Marker assisted pyramiding of three broad spectrum BB resistance genes (xa5, xa13, and Xa21) in prominent rice varieties is the most economical and effective strategy for the management of the BB disease. We report here the pyramiding of three genes (xa5, xa13, and Xa21) in maintainer lines (CO 2B, CO 23B, and CO 24B) of three promising wild abortive cytoplasmic male sterile lines (CO 2A, CO 23A, and CO 24A) through functional markers assisted back cross breeding...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28694258/plc%C3%AE-is-the-physiological-trigger-of-the-ca-2-oscillations-that-induce-embryogenesis-in-mammals-but-offspring-can-be-conceived-in-its-absence
#4
Alaa Hachem, Jonathan Godwin, Margarida Ruas, Hoi Chang Lee, Minerva Ferrer Buitrago, Goli Ardestani, Andrew Bassett, Sebastian Fox, Felipe Navarrete, Petra de Sutter, Björn Heindryckx, Rafael Fissore, John Parrington
Activation of the egg by the sperm is the first, vital stage of embryogenesis. The sperm protein PLCζ has been proposed as the physiological agent that triggers the Ca(2+) oscillations that normally initiate embryogenesis. Consistent with this, recombinant PLCζ induces Ca(2+) oscillations in eggs and debilitating mutations in the PLCZ1 gene are associated with infertility in men. However, there has been no evidence that gene knockout of PLCζ abolishes the ability of sperm to induce Ca(2+) oscillations in eggs...
July 10, 2017: Development
https://www.readbyqxmd.com/read/28689229/detection-of-candidate-nectin-gene-mutations-in-infertile-men-with-severe-teratospermia
#5
Richard Bronson, Anatoly Mikhailik, John Schwedes, Dimitri Gnatenko, Eli Hatchwell
PURPOSE: Approximately 40% of infertile men have an abnormal semen analysis, resulting from either abnormalities of sperm production (defective spermatogenesis) or sperm shape (defective spermiogenesis). This latter process is dependent upon the function of Sertoli cells, which maintain specialized junctional complexes with germ cells. Nectins, members of the immunoglobulin superfamily, participate in formation of these dynamic complexes. Male mice in which the nectin-2 or nectin-3 gene is knocked out are sterile...
July 8, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28678349/construction-of-a-multi-control-sterility-system-for-a-maize-male-sterile-line-and-hybrid-seed-production-based-on-the-zmms7-gene-encoding-a-phd-finger-transcription-factor
#6
Danfeng Zhang, Suowei Wu, Xueli An, Ke Xie, Yan Zhou, Liwen Xu, Wen Fang, Shensi Liu, Shuangshuang Liu, Taotao Zhu, Jinping Li, Liqun Rao, Jiuran Zhao, Xiangyuan Wan
Although hundreds of genetic male sterility (GMS) mutants have been identified in maize, few are commercially used due to a lack of effective methods to produce large quantities of pure male-sterile seeds. Here, we develop a multi-control sterility (MCS) system based on the maize male sterility 7 (ms7) mutant and its wild-type Zea mays Male sterility 7 (ZmMs7) gene via a transgenic strategy, leading to the utilization of GMS in hybrid seed production. ZmMs7 is isolated by a map-based cloning approach, and encodes a PHD-finger transcription factor orthologous to rice PTC1 and Arabidopsis MS1...
July 5, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28676817/cloning-and-functional-analysis-of-mads-box-genes-taag-a-and-taag-b-from-a-wheat-k-type-cytoplasmic-male-sterile-line
#7
Wenlong Yang, Xueyuan Lou, Juan Li, Mingyu Pu, Ameer A Mirbahar, Dongcheng Liu, Jiazhu Sun, Kehui Zhan, Lixiong He, Aimin Zhang
Wheat (Triticum aestivum L.) is a major crop worldwide. The utilization of heterosis is a promising approach to improve the yield and quality of wheat. Although there have been many studies on wheat cytoplasmic male sterility, its mechanism remains unclear. In this study, we identified two MADS-box genes from a wheat K-type cytoplasmic male sterile (CMS) line using homology-based cloning. These genes were localized on wheat chromosomes 3A and 3B and named TaAG-A and TaAG-B, respectively. Analysis of TaAG-A and TaAG-B expression patterns in leaves, spikes, roots, and stems of Chinese Spring wheat determined using quantitative RT-PCR revealed different expression levels in different tissues...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28676806/effects-of-drought-stress-on-pollen-sterility-grain-yield-abscisic-acid-and-protective-enzymes-in-two-winter-wheat-cultivars
#8
Baodi Dong, Xin Zheng, Haipei Liu, Jason A Able, Hong Yang, Huan Zhao, Mingming Zhang, Yunzhou Qiao, Yakai Wang, Mengyu Liu
Drought stress induced pollen sterility is a detrimental factor reducing grain number in wheat. Exploring the mechanisms underlying pollen fertility under drought conditions could assist breeding high-yielding wheat cultivars with stress tolerance. Here, by using two Chinese wheat cultivars subjected to different levels of polyethylene glycol (PEG)-induced drought stress, possible links between pollen fertility and stress tolerance were analyzed under different levels of drought stress at the young microspore stage...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28674278/genetic-characterization-and-fine-mapping-of-s25-a-hybrid-male-sterility-gene-on-rice-chromosome-12
#9
Takahiko Kubo, Atsushi Yoshimura, Nori Kurata
Hybrid male sterility genes are important factors in creating postzygotic reproductive isolation barriers in plants. One such gene, S25, is known to cause severe transmission ratio distortion in inter-subspecific progeny of cultivated rice Oryza sativa ssp. indica and japonica. To further characterize the S25 gene, we fine-mapped and genetically characterized the S25 gene using near-isogenic lines with reciprocal genetic backgrounds. We mapped the S25 locus within a 0.67-1.02 Mb region on rice chromosome 12...
June 30, 2017: Genes & Genetic Systems
https://www.readbyqxmd.com/read/28671593/high-consumption-of-iron-exacerbates-hyperlipidemia-atherosclerosis-and-female-sterility-in-zebrafish-via-acceleration-of-glycation-and-degradation-of-serum-lipoproteins
#10
So-Hee Kim, Dhananjay Yadav, Suk-Jeong Kim, Jae-Ryong Kim, Kyung-Hyun Cho
Elevated serum iron level is linked with an increased risk of diabetes and atherosclerosis. However, the pathological mechanism by which iron affects serum lipoprotein levels is unknown. To elucidate the mechanism, a high dose of ferrous ion was applied (final 60 µM, 120 µM) to human serum lipoproteins, macrophages, and human dermal fibroblast (HDF) cells. Iron-treated lipoproteins showed loss of antioxidant ability along with protein degradation and multimerization, especially co-treatment with fructose (final 10 mM)...
July 2, 2017: Nutrients
https://www.readbyqxmd.com/read/28667797/differential-growth-costs-and-nitrogen-fixation-in-cytisus-multiflorus-l-h%C3%A3-r-sweet-and-cytisus-scoparius-l-link-are-mediated-by-sources-of-inorganic-n
#11
M A Pérez-Fernández, E Calvo-Magro, J Rodríguez-Sánchez, A Valentine
Shrubby legumes in Mediterranean-type ecosystems face strong nutrient limitations that worsen in summer time, when water is absent. Nitrogen fixing legumes are likely to be able to switch between soil nitrogen (N) and atmospheric nitrogen (N2 ) sources to adjust the C costs of N acquisition in different seasons. We investigated the utilisation of different inorganic N sources by two indigenous shrubby legumes (Cytisus multiflorus and Cytisus scoparius). Plant performance in terms of photosynthesis and biomass production was also analysed...
July 1, 2017: Plant Biology
https://www.readbyqxmd.com/read/28664529/phenology-sterility-and-inheritance-of-two-environment-genic-male-sterile-egms-lines-for-hybrid-rice
#12
R El-Namaky, P A J van Oort
BACKGROUND: There is still limited quantitative understanding of how environmental factors affect sterility of Environment-conditioned genic male sterility (EGMS) lines. A model was developed for this purpose and tested based on experimental data from Ndiaye (Senegal) in 2013-2015. For the two EGMS lines tested here, it was not clear if one or more recessive gene(s) were causing male sterility. This was tested by studying sterility segregation of the F2 populations. RESULTS: Daylength (photoperiod) and minimum temperatures during the period from panicle initiation to flowering had significant effects on male sterility...
December 2017: Rice
https://www.readbyqxmd.com/read/28657614/genetic-analysis-of-a-hybrid-sterility-gene-that-causes-both-pollen-and-embryo-sac-sterility-in-hybrids-between-oryza-sativa-l-and-oryza-longistaminata
#13
H Chen, Z Zhao, L Liu, W Kong, Y Lin, S You, W Bai, Y Xiao, H Zheng, L Jiang, J Li, J Zhou, D Tao, J Wan
Oryza longistaminata originates from African wild rice and contains valuable traits conferring tolerance to biotic and abiotic stress. However, interspecific crosses between O. longistaminata and Oryza sativa cultivars are hindered by reproductive barriers. To dissect the mechanism of interspecific hybrid sterility, we developed a near-isogenic line (NIL) using indica variety RD23 as the recipient parent and O. longistaminata as the donor parent. Both pollen and embryo sac semi-sterility were observed in F1 hybrids between RD23 and NIL...
June 28, 2017: Heredity
https://www.readbyqxmd.com/read/28638401/development-of-elite-bph-resistant-wide-spectrum-restorer-lines-for-three-and-two-line-hybrid-rice
#14
Fengfeng Fan, Nengwu Li, Yunping Chen, Xingdan Liu, Heng Sun, Jie Wang, Guangcun He, Yingguo Zhu, Shaoqing Li
Hybrid rice has contributed significantly to the world food security. Breeding of elite high-yield, strong-resistant broad-spectrum restorer line is an important strategy for hybrid rice in commercial breeding programs. Here, we developed three elite brown planthopper (BPH)-resistant wide-spectrum restorer lines by pyramiding big-panicle gene Gn8.1, BPH-resistant genes Bph6 and Bph9, fertility restorer genes Rf3, Rf4, Rf5, and Rf6 through molecular marker assisted selection. Resistance analysis revealed that the newly developed restorer lines showed stronger BPH-resistance than any of the single-gene donor parent Luoyang-6 and Luoyang-9...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28636095/suppression-or-knockout-of-saf-sam-overcomes-the-sa-mediated-hybrid-male-sterility-in-rice
#15
Yongyao Xie, Baixiao Niu, Yunming Long, Gousi Li, Jintao Tang, Yaling Zhang, Ding Ren, Yao-Guang Liu, Letian Chen
Hybrids between the indica and japonica subspecies of rice (Oryza sativa) are usually sterile, which hinders utilization of heterosis in the inter-subspecific hybrid breeding. The complex locus Sa comprises two adjacently located genes, SaF and SaM, which interact to cause abortion of pollen grains carrying the japonica allele in japonica-indica hybrids. Here we showed that silencing of SaF or SaM by RNA interference restored male fertility in indica-japonica hybrids with heterozygous Sa. We further used CRISPR/Cas9-based genome editing to knockout the SaF and SaM alleles respectively of an indica rice line to create hybrid-compatible lines...
June 21, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28635129/micrornas-involved-in-auxin-signalling-modulate-male-sterility-under-high-temperature-stress-in-cotton-gossypium-hirsutum
#16
Yuanhao Ding, Yizan Ma, Nian Liu, Jiao Xu, Qin Hu, Yaoyao Li, Yuanlong Wu, Sai Xie, Longfu Zhu, Ling Min, Xianlong Zhang
Male sterility caused by long-term high temperature (HT) stress occurs widely in crops. MicroRNAs (miRNAs), a class of endogenous non-coding small RNAs, play an important role in the plant response to various abiotic stresses. To dissect the working principle of miRNAs in male sterility under HT stress in cotton, a total of 112 known miRNAs, 270 novel miRNAs and 347 target genes were identified from anthers of HT-insensitive (84021) and HT-sensitive (H05) cotton cultivars under normal temperature (NT) and HT conditions through small RNA and degradome sequencing...
June 21, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28634273/the-c-elegans-vapb-homolog-vpr-1-is-a-permissive-signal-for-gonad-development
#17
Pauline A Cottee, Tim Cole, Jessica Schultz, Hieu D Hoang, Jack Vibbert, Sung Min Han, Michael A Miller
VAMP/synaptobrevin-associated proteins (VAPs) contain an N-terminal major sperm protein domain (MSPd) that is associated with amyotrophic lateral sclerosis. VAPs have an intracellular housekeeping function, as well as an extracellular signaling function mediated by the secreted MSPd. Here we show that the C. elegans VAP homolog VPR-1 is essential for gonad development. vpr-1 null mutants are maternal effect sterile due to arrested gonadogenesis following embryo hatching. Somatic gonadal precursor cells and germ cells fail to proliferate fully and complete their respective differentiation programs...
June 15, 2017: Development
https://www.readbyqxmd.com/read/28630322/tcte1-is-a-conserved-component-of-the-dynein-regulatory-complex-and-is-required-for-motility-and-metabolism-in-mouse-spermatozoa
#18
Julio M Castaneda, Rong Hua, Haruhiko Miyata, Asami Oji, Yueshuai Guo, Yiwei Cheng, Tao Zhou, Xuejiang Guo, Yiqiang Cui, Bin Shen, Zibin Wang, Zhibin Hu, Zuomin Zhou, Jiahao Sha, Renata Prunskaite-Hyyrylainen, Zhifeng Yu, Ramiro Ramirez-Solis, Masahito Ikawa, Martin M Matzuk, Mingxi Liu
Flagella and cilia are critical cellular organelles that provide a means for cells to sense and progress through their environment. The central component of flagella and cilia is the axoneme, which comprises the "9+2" microtubule arrangement, dynein arms, radial spokes, and the nexin-dynein regulatory complex (N-DRC). Failure to properly assemble components of the axoneme leads to defective flagella and in humans leads to a collection of diseases referred to as ciliopathies. Ciliopathies can manifest as severe syndromic diseases that affect lung and kidney function, central nervous system development, bone formation, visceral organ organization, and reproduction...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28625022/ethical-moral-and-theological-insights-into-advances-in-male-pediatric-and-adolescent-fertility-preservation
#19
REVIEW
J J Ramstein, J Halpern, A J Gadzinski, R E Brannigan, J F Smith
The successful treatment of boys with cancer has led to increasing attention to preserving their quality of life after completing cancer therapy. One of the top priorities for living a full life is keeping open the opportunity to have children. While sperm banking for males facing sterilizing cancer treatment can be effective, this approach requires subsequent use of reproductive procedures such as in vitro fertilization (IVF) or intrauterine insemination (IUI) to achieve a pregnancy. Advances in fertility preservation techniques may allow pre-pubertal boys to conceive using advanced stem cell technologies and stem cell transplantation in the future...
June 18, 2017: Andrology
https://www.readbyqxmd.com/read/28621722/comparative-analysis-of-genome-wide-dna-methylation-profiles-for-the-genic-male-sterile-cabbage-line-01-20s-and-its-maintainer-line
#20
Fengqing Han, Xiaoli Zhang, Xing Liu, Henan Su, Congcong Kong, Zhiyuan Fang, Limei Yang, Mu Zhuang, Yangyong Zhang, Yumei Liu, Zhansheng Li, Honghao Lv
Methylation modifications play an important role in multiple biological processes. Several studies have reported altered methylation patterns in male sterile plants such as rice and wheat, but little is known about the global methylation profiles and their possible roles in the cabbage (Brassicaoleracea) male sterile line. In this study, single-base-resolution bisulfite sequencing (BS-Seq) was adopted to identify the pattern and degree of cytosine methylation in the male sterile line 01-20S and its near-isogenic fertile line 01-20F...
June 16, 2017: Genes
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