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| 1 | The polyketide synthase OsPKS2 is essential for pollen exine and Ubisch body patterning in rice显示文摘Lipid and phenolic metabolism are important for pollen exine formation. In Arabidopsis, polyketide synthases(PKSs) are essential for both sporopollenin biosynthesis and exine formation. Here, we characterized the role of a polyketide synthase(OsPKS2) in male reproduction of rice(Oryza sativa). Recombinant OsPKS2 catalyzed the condensation of fatty acyl-CoA with malonyl-CoA to generate triketide and tetraketide α-pyrones, the main components of pollen exine. Indeed, the ospks2 mutant had defective exine patterning and was male sterile. However, the mutant showed no significant reduction in sporopollenin accumulation. Compared with the WT(wild type), ospks2 displayed unconfined and amorphous tectum and nexine layers in the exine, and less organized Ubisch bodies. Like the pksb/lap5 mutant of the Arabidopsis ortholog, ospks2 showed broad alterations in the profiles of anther-related phenolic compounds.However, unlike pksb/lap5, in which most detected phenolics were substantially decreased, ospks2 accumulated higher levels of phenolics. Based on these results and our observation that OsPKS2 is unable to fully restore the exine defects in the pksb/lap5, we propose that PKS proteins have functionally diversified during evolution.Collectively, our results suggest that PKSs represent a conserved and diversified biochemical pathway for anther and pollen development in higher plants. | Xiaolei Zhu Jing Yu Jianxin Shi Takayuki Tohge Alisdair R.Fernie Sagit Meir Asaph Aharoni Dawei Xu Dabing Zhang Wanqi Liang | 2017 | Journal of Integrative Plant Biology2017，59，9： | 9 |
| 2 | Glycosylation of N-hydroxy-pipecolic acid equilibrates between systemic acquired resistance response and plant growth显示文摘N-hydroxy-pipecolic acid(NHP)activates plant systemic acquired resistance(SAR).Enhanced defense responses are typically accompanied by deficiency in plant development and reproduction.Despite of extensive studies on SAR induction,the effects of NHPmetabolismon plant growth remain largely unclear.In this study,we discovered that NHP glycosylation is a critical factor that fine-tunes the tradeoff between SAR defense and plant growth.We demonstrated that a UDP-glycosyltransferase(UGT76B1)forming NHP glycoside(NHPG)controls the NHP to NHPG ratio.Consistently,the ugt76b1 mutant exhibits enhanced SAR response and an inhibitory effect on plant growth,while UGT76B1 overexpression attenuates SAR response,promotes growth,and delays senescence,indicating that NHP levels are dependent on UGT76B1 function in the course of SAR.Furthermore,our results suggested that,upon pathogen attack,UGT76B1-mediated NHP glycosylation forms a‘‘hand brake’’on NHP accumulation by attenuating the positive regulation of NHP biosynthetic pathway genes,highlighting the complexity of SAR-associated networks.In addition,we showed that UGT76B1-mediated NHP glycosylation in the local site is important for fine-tuning SAR response.Our results implicate that engineering plant immunity through manipulating the NHP/NHPG ratio is a promising method to balance growth and defense response in crops. | Jianghua Cai Adam Jozwiak Lara Holoidovsky Michael MMeijler Sagit Meir Ilana Rogachev Asaph Aharoni | 2021 | Molecular Plant2021，14，3： | 2 |
| 3 | Simultaneous wavefront-guided photorefractive keratectomy and corneal collagen crosslinking after intrastromal corneal ring segment implantation for keratoconus显示文摘 | Israel Kremer Isaac Aizenman Henia Lichter Sagit Shayer Samuel Levinger | 2012 | Journal of Cataract & Refractive Surgery2012，，10： | 2 |
| 4 | Impact of septoplasty on mean platelet volume levels in patients with marked nasal septal deviation显示文摘 | SAGIT M KORKMAZ F KAVUGUDURMAZ M | 2012 | J Cranilfac Surg2012，23，： | 1 |
| 5 | An unusual tumour of the cerbel- lopontine angle 显示文摘 | Mulu M Sagit M Akin I | 2009 | B-ENT2009，5，4： | 1 |
| 6 | Detection of Wildand Vaccine-Type Avian Infectious Laryngotracheitis Virus in Clinical Samples and Feather Shafts of Commercial Chickens显示文摘 | IRIT DAVIDSON SAGIT NAGAR ISRAEL RIBSHTEIN | | 0，，04： | 1 |
| 7 | Evaluation of treatment efficacy in patients with minimal nasal septum deviation and concha bullosa using thenasal obstruction symptom evaluation scale显示文摘 | Sagit M Korkmaz F Yasar M | 2013 | Kulak Bu-run Bogaz Ihtis Derg2013，23，2： | 1 |
| 8 | Nasopharyngeal tuberculosis:an unusual cause of nasal obstruction and snoring显示文摘 | Kuran G Sagit M Saka C | | 0，，04： | 1 |
| 9 | Efficacy of a singlepreoperative dose of pregabalin for postoperative pain after septo-plasty显示文摘 | Mustafa Sagit Saban Yalcin Halil Polat | 2013 | The Journal of craniofacial surgery2013，24，2： | 1 |
| 10 | Nasopharyngeal tuberculosis: an unusual cause of nasal obstruction and snoring 显示文摘 | Kuran G Sagit M Saka C | 2008 | B-ENT2008，4，4： | 1 |
| 11 | Evaluation of treat- ment efficacy in patients with minimal nasal septum deviation and concha bullosa using the nasal obstruction symptom evalu- ation scale显示文摘 | Sagit M Korkmaz F Yasar M | 2013 | Kulak burun bogas ihtisas dergisi: KBB= Journal of ear nose and throat2013，23，2： | 1 |
| 12 | Protective effect of thymoquinone against cisplatin-induced ototoxicity 显示文摘 | Sagit M Korkmaz F Akcadag A | 2013 | Eur Arch Otorhinolaryngol2013，270，8： | 1 |
| 13 | Bilateral epithelialmyoepithelial carcinoma:an extraordinary tumor of the paranasal sinuses显示文摘 | Kuran G Sagit M Akin I | 2008 | Skull Base2008，18，2： | 1 |
| 14 | Disruption of gap junctional communication within the ovarian follicle induces oocyte maturation 显示文摘 | Sagit Sela-Abramovich Iris Edry Dalia Galiani | 2006 | Endocrinology2006，147，5： | 1 |
| 15 | Impact of septoplasty on mean platelet volume levels in patients with marked nasal septal deviation 显示文摘 | Sagit M Korkmaz F Kavugudurmaz M | 2012 | J Craniofac Surg2012，23，4： | 1 |
| 16 | An unusual mass filling within the middle meatus显示文摘 | Sagit M Guler S Yasar M | | 0，，06： | 1 |
| 17 | Bilateral epithelial-myoep- ithelial carcinoma: an extraordinary tumor of the parana-sal si- nuses显示文摘 | Kuran G Sagit M Akin I | 2008 | Skull Base2008，18，： | 1 |
| 18 | Impact of mean platelet volume on theoccurrence and severity of sudden sensorineural hearing loss显示文摘 | Sagit M Kavugudurmaz M Guler S | 2013 | J Laryngol Otol2013，127，10： | 1 |
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