scholarly journals Two pivotal RNA editing sites in the mitochondrial atp1 mRNA are required for ATP synthase to produce sufficient ATP for cotton fiber cell elongation

2018 ◽  
Vol 218 (1) ◽  
pp. 167-182 ◽  
Author(s):  
Peng He ◽  
Guanghui Xiao ◽  
Hao Liu ◽  
Lihua Zhang ◽  
Li Zhao ◽  
...  
Keyword(s):  
Rna Editing ◽  
Atp Synthase ◽  
Cotton Fiber ◽  
Cell Elongation ◽  
Fiber Cell

scholarly journals Transcriptome Profiling, Molecular Biological, and Physiological Studies Reveal a Major Role for Ethylene in Cotton Fiber Cell Elongation

2006 ◽  
Vol 18 (3) ◽  
pp. 651-664 ◽  
Author(s):  
Yong-Hui Shi ◽  
Sheng-Wei Zhu ◽  
Xi-Zeng Mao ◽  
Jian-Xun Feng ◽  
Yong-Mei Qin ◽  
...  
Keyword(s):  
Cotton Fiber ◽  
Cell Elongation ◽  
Transcriptome Profiling ◽  
Fiber Cell ◽  
Physiological Studies

scholarly journals Sphingolipid Profile during Cotton Fiber Growth Revealed That a Phytoceramide Containing Hydroxylated and Saturated VLCFA Is Important for Fiber Cell Elongation

Biomolecules ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1352
Author(s):  
Qian Chen ◽  
Fan Xu ◽  
Li Wang ◽  
Xiaodong Suo ◽  
Qiaoling Wang ◽  
...  
Keyword(s):  
Molecular Species ◽  
Cotton Fiber ◽  
Cell Elongation ◽  
Growth And Development ◽  
Fiber Cell ◽  
Sphingolipid Metabolism ◽  
Fiber Growth ◽  
Fiber Cells ◽  
Exogenous Application ◽  
Long Chain

Cotton fiber is a single-celled seed trichrome that arises from the epidermis of the ovule’s outer integument. The fiber cell displays high polar expansion and thickens but not is disrupted by cell division. Therefore, it is an ideal model for studying the growth and development of plant cells. Sphingolipids are important components of membranes and are also active molecules in cells. However, the sphingolipid profile during fiber growth and the differences in sphingolipid metabolism at different developmental stages are still unclear. In this study, we detected that there were 6 classes and 95 molecular species of sphingolipids in cotton fibers by ultrahigh performance liquid chromatography-MS/MS (UHPLC-MS/MS). Among these, the phytoceramides (PhytoCer) contained the most molecular species, and the PhytoCer content was highest, while that of sphingosine-1-phosphate (S1P) was the lowest. The content of PhytoCer, phytoceramides with hydroxylated fatty acyls (PhytoCer-OHFA), phyto-glucosylceramides (Phyto-GluCer), and glycosyl-inositol-phospho-ceramides (GIPC) was higher than that of other classes in fiber cells. With the development of fiber cells, phytosphingosine-1-phosphate (t-S1P) and PhytoCer changed greatly. The sphingolipid molecular species Ceramide (Cer) d18:1/26:1, PhytoCer t18:1/26:0, PhytoCer t18:0/26:0, PhytoCer t18:1/h20:0, PhytoCer t18:1/h26:0, PhytoCer t18:0/h26:0, and GIPC t18:0/h16:0 were significantly enriched in 10-DPA fiber cells while Cer d18:1/20:0, Cer d18:1/22:0, and GIPC t18:0/h18:0 were significantly enriched in 20-DPA fiber cells, indicating that unsaturated PhytoCer containing hydroxylated and saturated very long chain fatty acids (VLCFA) play some role in fiber cell elongation. Consistent with the content analysis results, the related genes involved in long chain base (LCB) hydroxylation and unsaturation as well as VLCFA synthesis and hydroxylation were highly expressed in rapidly elongating fiber cells. Furthermore, the exogenous application of a potent inhibitor of serine palmitoyltransferase, myriocin, severely blocked fiber cell elongation, and the exogenous application of sphingosine antagonized the inhibition of myriocin for fiber elongation. Taking these points together, we concluded that sphingolipids play crucial roles in fiber cell elongation and SCW deposition. This provides a new perspective for further studies on the regulatory mechanism of the growth and development of cotton fiber cells.

scholarly journals RNA editing of wheat mitochondrial ATP synthase subunit 9: direct protein and cDNA sequencing.

1990 ◽  
Vol 2 (12) ◽  
pp. 1283-1290 ◽  
Author(s):  
D Bégu ◽  
P V Graves ◽  
C Domec ◽  
G Arselin ◽  
S Litvak ◽  
...  
Keyword(s):  
Rna Editing ◽  
Atp Synthase ◽  
Cdna Sequencing ◽  
Mitochondrial Atp Synthase ◽  
Subunit 9

scholarly journals Cytokinin inhibits cotton fiber initiation by disrupting PIN3a-mediated asymmetric accumulation of auxin in the ovule epidermis

2019 ◽  
Vol 70 (12) ◽  
pp. 3139-3151 ◽  
Author(s):  
Jianyan Zeng ◽  
Mi Zhang ◽  
Lei Hou ◽  
Wenqin Bai ◽  
Xingying Yan ◽  
...  
Keyword(s):  
Cotton Fiber ◽  
Plasma Membranes ◽  
Antagonistic Effect ◽  
Fiber Cell ◽  
In Planta ◽  
Polar Localization ◽  
Fiber Cells ◽  
Fiber Initiation ◽  
Fiber Cell Initiation

AbstractAuxin-dependent cell expansion is crucial for initiation of fiber cells in cotton (Gossypium hirsutum), which ultimately determines fiber yield and quality. However, the regulation of this process is far from being well understood. In this study, we demonstrate an antagonistic effect between cytokinin (CK) and auxin on cotton fiber initiation. In vitro and in planta experiments indicate that enhanced CK levels can reduce auxin accumulation in the ovule integument, which may account for the defects in the fiberless mutant xu142fl. In turn, supplementation with auxin can recover fiber growth of CK-treated ovules and mutant ovules. We further found that GhPIN3a is a key auxin transporter for fiber-cell initiation and is polarly localized to the plasma membranes of non-fiber cells, but not to those of fiber cells. This polar localization allows auxin to be transported within the ovule integument while specifically accumulating in fiber cells. We show that CKs antagonize the promotive effect of auxin on fiber cell initiation by undermining asymmetric accumulation of auxin in the ovule epidermis through down-regulation of GhPIN3a and disturbance of the polar localization of the protein.

Direct protein sequencing of wheat mitochondrial ATP synthase subunit 9 confirms RNA editing in plants

1990 ◽  
Vol 214 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Pierre Vincent Graves ◽  
Dominique Be´gu ◽  
Jean Velours ◽  
Elisabeth Neau ◽  
Francis Belloc ◽  
...  
Keyword(s):  
Rna Editing ◽  
Atp Synthase ◽  
Protein Sequencing ◽  
Mitochondrial Atp Synthase ◽  
Subunit 9
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