Shandong Institute of Pomology

Taian, China

Shandong Institute of Pomology

Taian, China
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Zhao X.,Nanjing Forestry University | Zhao X.,Shandong Institute of Pomology | Yuan Z.,Shandong Institute of Pomology | Fang Y.,Nanjing Forestry University | And 2 more authors.
European Food Research and Technology | Year: 2013

Three red pomegranate cultivars of different coloration in China (Lvbaoshi, Hongbaoshi, Moshiliu) were analyzed quantitatively during ripening for individual anthocyanin (AC) pigment content. For the first time, anthocyanin peonidin-hexoside and flavonol myricetin-hexoside were tentatively identified in Moshiliu pomegranate. Cy3G, Pg3G, and Cy3,5dG were the first three major ACs in Hongbaoshi and followed a similar changing pattern with ripening time. Large amounts of Cy3G and Dp3G were found in dark red Moshiliu cultivar, exhibiting a similar pattern over time. The main concentration of Cy3G was 53. 52 mg 100 g-1, which was 35-fold and 12-fold higher compared to Lvbaoshi and Hongbaoshi cultivar. The main concentration of Dp3G reached 34. 36 mg 100 g-1 which was generally 68-fold and 82-fold higher than Lvbaoshi and Hongbaoshi. The main concentration of Cy3,5dG, Cy3G, and Pg3G levels in Hongbaoshi presented significant differences during ripening period (p < 0. 05) compared with the Lvbaoshi cultivar. The AC profile was linked closely to the level of pigmentation. The results highlighted that cultivars and development phases influenced AC profile significantly. Data derived from study of the ratio between diglucosides and monoglucosides led to characterize the ACs in three different red pomegranate fruits. © 2012 Springer-Verlag Berlin Heidelberg.

Sun Q.,Shandong Institute of Pomology | Sun H.,Shandong Institute of Pomology | Bell R.L.,U.S. Department of Agriculture | Li H.,Shandong Institute of Pomology | Xin L.,Shandong Institute of Pomology
Plant Cell, Tissue and Organ Culture | Year: 2011

A wide range of phenotypic variation was observed among neopolyploids obtained from the diploid pear cultivar 'Fertility' by in vitro colchicine treatment. The variant plantlets had alterations in leaf characteristics. Neopolyploids had significantly different ratios of leaf length to leaf width compared to the diploid control. Shoot regeneration from leaf explants and rooting ability from in vitro shoots of neopolyploids was examined. Regeneration frequencies of shoots from leaf explants of seven of the nine neopolyploids were significantly decreased compared to the diploid control. The organogenic potential of neopolyploids was highly genotype-dependent for both shoots and roots. Tetraploid clone 4x-4 failed to regenerate shoots from leaf explants and the pentaploid clone 5x-2 failed to root from in vitro shoots. The results suggest that polyploidization caused the decrease in or loss of in vitro organogenic potential. Regenerated shoots derived from neopolyploids showed different phenotypes, depending on the ploidy of the donor plant. © 2011 Springer Science+Business Media B.V.

Yu X.,Shandong Institute of Pomology | Ai C.,Shandong Institute of Pomology | Xin L.,Shandong Institute of Pomology | Zhou G.,Shandong Institute of Pomology
European Journal of Soil Biology | Year: 2011

In this study, the Chrome Azurol Sulphonate (CAS) agar plate assay for siderophores was used to screen bacteria from the rhizospheric soil of pepper in Hainan, China. As a result, Bacillus subtilis CAS15, which produced a large orange halo, was obtained. A dual-culture test showed that CAS15 strongly antagonized the growth of 15 plant fungal pathogens, with rates of inhibition ranging from 19.26 to 94.07%. Analysis of the siderophore production by the ESI-MS and DHB(G) assays showed that CAS15 produced the catecholic siderophore 2,3-dihydroxybenzoate-glycine-threonine trimeric ester bacillibactin, and that siderophore productivity was inhibited by iron. A pot culture experiment was used to study the effects of B. subtilis CAS15 on pathogen development and plant growth. CAS15 reduced the incidence of Fusarium wilt in pepper significantly, by 12.5-56.9%, which indicated that B. subtilis CAS15 induced systemic resistance to Fusarium wilt in pepper. Iron supplementation reduced this biocontrol effect. There were significant differences in plant height at 14, 21, 28 and 40 days, with treated plants growing 27.24-54.53% taller than controls. B. subtilis CAS15 also enhanced the yield of pepper by shortening the time to 50 percent flowering to 17.26 days, increasing the average fruit weight 36.92%, and increasing the average yield per plant 49.68%. This research showed that B. subtilis CAS15 has great potential for plant growth promotion and biological control. © 2010 Elsevier Masson SAS.

Gao H.J.,Shandong Institute of Pomology | Yang H.Q.,Shandong Agricultural University
Plant, Soil and Environment | Year: 2011

The time-dependent production of nitric oxide (NO) in roots induced by indole-3-butyric acid (IBA) and the effect of sodium nitroprusside (SNP) on root architecture development were investigated, using Malus hupehensis Rehd. seedlings. Following IBA application, a very rapid increase in NO formation and a subsequent second wave of NO burst was observed, which was related to the induction of lateral roots (LRs) and the organogenesis of lateral root primordia (LRP), respectively. The first NO burst was correlated with the second and the two peaks of NO burst induced by IBA were totally abolished by 3,3',4',5,7-pentahydroxyflavone (quercetin). Exogenous NO promoted the emergence and elongation of LR and inhibited the elongation of primary root (PR) in a dose-dependent manner: low concentrations of SNP promoted both the amounts and the elongation of LR but inhibited the elongation of LR and PR at higher concentrations. It was concluded that (i) the rapid production of NO induced by IBA was correlated with the IBA-induced initiation of LR; (ii) quercetin inhibition of IBA-induced LR formation was correlated with the quercetin inhibition of IBA-induced NO biosynthesis, and (iii) exogenous NO affects the development of root system architecture in a dose-dependent manner.

Wang G.P.,Shandong Agricultural University | Wang G.P.,Shandong Institute of Pomology | Zhang X.Y.,Shandong Agricultural University | Li F.,Shandong Agricultural University | And 2 more authors.
Photosynthetica | Year: 2010

We investigated the different responses of wheat (Triticum aestivum L.) plants to drought- (DS) and heat stress (HS), and analyzed the physiological mechanisms of glycine betaine (GB) involved in the improvement of wheat tolerance to the combination of these stresses. The transgenic wheat T6 line was generated by introducing a gene encoding betaine aldehyde dehydrogenase (BADH) into the wild-type (WT) Shi4185 line. The gene was cloned from the Garden Orache plant (Atriplex hortensis L.). Wheat seedlings were subjected to drought stress (30%, PEG-6000), heat stress (40°C), and their combination. Photosynthetic gas exchange, water status and lipid peroxidation of wheat leaves were examined under different stresses. When subjected to a combination of drought and heat, the inhibition of photosynthesis was significantly increased compared to that under DS or HS alone. The increased inhibition of photosynthesis by the combined stresses was not simply the additive stress effect of separate heat- and drought treatments; different responses in plant physiology to DS and HS were also found. HS decreased the chlorophyll (Chl) content, net photosynthetic rate (PN), carboxylation efficiency (CE) and apparent quantum yield (AQY) more than DS but DS decreased the transpiration rate (E), stomata conductance (gs) and intercellular CO2 concentration (Ci) more than HS. GB over-accumulation led to increased photosynthesis not only under individual DS or HS but also under their combination. The enhancement of antioxidant activity and the improvement of water status may be the mechanisms underlying the improvement of photosynthesis by GB in wheat plants. © 2010 Springer Science+Business Media B.V.

Feng X.-M.,Shandong Agricultural University | Zhao Q.,Shandong Agricultural University | Zhao L.-L.,Shandong Academy of Agricultural Sciences | Qiao Y.,Shandong Agricultural University | And 5 more authors.
BMC Plant Biology | Year: 2012

Background: Plant growth is greatly affected by low temperatures, and the expression of a number of genes is induced by cold stress. Although many genes in the cold signaling pathway have been identified in Arabidopsis, little is known about the transcription factors involved in the cold stress response in apple.Results: Here, we show that the apple bHLH (basic helix-loop-helix) gene MdCIbHLH1 (Cold-Induced bHLH1), which encodes an ICE-like protein, was noticeably induced in response to cold stress. The MdCIbHLH1 protein specifically bound to the MYC recognition sequences in the AtCBF3 promoter, and MdCIbHLH1 overexpression enhanced cold tolerance in transgenic Arabidopsis. In addition, the MdCIbHLH1 protein bound to the promoters of MdCBF2 and favorably contributed to cold tolerance in transgenic apple plants by upregulating the expression of MdCBF2 through the CBF (C-repeat-binding factor) pathway. Our findings indicate that MdCIbHLH1 functions in stress tolerance in different species. For example, ectopic MdCIbHLH1 expression conferred enhanced chilling tolerance in transgenic tobacco. Finally, we observed that cold induces the degradation of the MdCIbHLH1 protein in apple and that this degradation was potentially mediated by ubiquitination and sumoylation.Conclusions: Based on these findings, MdCIbHLH1 encodes a transcription factor that is important for the cold tolerance response in apple. © 2012 Feng et al; licensee BioMed Central Ltd.

Jiao P.,Taishan Medical University | Zhou Y.-S.,Central Hospital of Taian | Yang J.-X.,Shandong Institute of Pomology | Zhao Y.-L.,Taishan Medical University | And 3 more authors.
Molecular and Cellular Biochemistry | Year: 2013

It has become evident that AKT inhibitors have great potential in cancer treatment. In this study, we investigate the anticancer activity of MK-2206, a novel AKT inhibitor, on HepG2 hepatocellular carcinoma cell, and to show whether MK-2206 enhances the apoptosis-inducing potential of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). The cell growth inhibition was evaluated by MTT assay and colony formation assay. Cell cycle distribution was assessed by propidium iodide flow cytometry. Apoptosis was determined by AnnexinV-FITC/PI double staining assay and caspase-9, casapse-7, caspase-3, and PARP cleavage. The results of present study showed that MK-2206-induced G1-phase arrest was associated with a marked decrease in the protein expression of cyclin D1 with concomitant induction of p21 and p27. MK-2206-induced apoptosis was characterized by cleavage of a pro-caspase in a concentration-dependent manner. Moreover, the MAP family kinases p38 kinase and JNK were activated by exposure to MK-2206. SB203580, an p38-specific inhibitor, partially blocked MK-2206-induced death of HepG2 cells and caspase activation. A combination of MK-2206 with TRAIL significantly inhibited growth of TRAIL resistant HepG2 cells. Taken together, our findings provide a new insight to better understand anticancer mechanisms of MK-2206, at least in HepG2 cell. Using of MK-2206 as a potent sensitizer to TRAIL-induced apoptotic cell death offers a promising means of enhancing the efficacy of TRAIL-based HCC treatments. © 2013 Springer Science+Business Media New York.

Tian F.X.,Shandong Agricultural University | Gong J.F.,Shandong Agricultural University | Wang G.P.,Shandong Agricultural University | Wang G.P.,Shandong Institute of Pomology | And 3 more authors.
Biologia Plantarum | Year: 2012

We investigated the drought resistance of a wheat (Triticum aestivum L.) stay-green mutant tasg1 and its wild-type (WT) in field experiments conducted for two years. Drought stress was imposed by controlling irrigation and sheltering the plants from rain. Compared with the WT, tasg1 exhibited a distinct delayed senescence under both normal and drought stress conditions, as indicated by slower degradation of chlorophyll and decrease in net photosynthetic rate than in WT. At the same time, tasg1 mutants maintained more integrated chloroplasts and thylakoid ultrastructure than did WT plants under drought stress. Lower malondialdehyde content and higher antioxidative enzyme activities in tasg1, compared to WT, may be involved in the stay-green phenotype and drought resistance of tasg1. © 2012 Springer Science+Business Media B.V.

Li F.,Shandong Agricultural University | Xing S.,Shandong Agricultural University | Guo Q.,Shandong Agricultural University | Zhao M.,Shandong Agricultural University | And 4 more authors.
Journal of Plant Physiology | Year: 2011

Expansins are proteins that are the key regulators of wall extension during plant growth. To investigate the role of TaEXPB23, a wheat expansin gene, we analyzed TaEXPB23 mRNA expression levels in response to water stress in wheat and examined the drought resistance of transgenic tobaccos over-expressing TaEXPB23. We found that the expression of TaEXPB23 corresponded to wheat coleoptile growth and the response to water stress. The results also indicated that the transgenic tobacco lines lost water more slowly than the wild-type (WT) plants under drought stress; their cells could sustain a more integrated structure under water stress than that of WT. Other physiological and biochemical parameters under water stress, such as electrolyte leakage, malondialdehyde (MDA) level, photosynthetic rate, Fv/Fm and ΦPSII, also suggested that the transgenic tobaccos were more drought resistant than WT plants. © 2011 Elsevier GmbH.

Yuan K.,Shandong Institute of Pomology | Wang C.,Shandong Institute of Pomology | Wang J.,Shandong Academy of Agricultural Sciences | Xin L.,Shandong Institute of Pomology | And 3 more authors.
Molecular Genetics and Genomics | Year: 2014

MdMYB1, a key transcription factor determining apple skin color, coordinately regulates genes in the anthocyanin pathway. In this study, we analyzed the MdMYB1 gene and its relationship to apple skin color and fruit-bearing traits to better understand this gene and its application to apple breeding. A previously reported MdMYB1 dCAPS marker failed to identify alleles of the MdMYB1 gene in ‘Fuji’, a very important apple cultivar. In this study, we revealed that the polymorphic site related to the MdMYB1 dCAPS marker is heterozygous in ‘Fuji’. In addition, two new polymorphic sites related to apple skin color were identified in the MdMYB1 gene, with two new molecular markers accordingly developed. Testing of these markers in ‘Fuji’ and its progeny revealed that they could predict apple skin color and identify alleles of the MdMYB1 gene in this cultivar. Most interestingly, the allele MdMYB1-2 in ‘Gala’ apple and its hybrid plants was found to be related to the fruit-bearing trait, and the molecular marker Mb2 was able to identify the MdMYB1-2 allele. Our study is apparently the first to report a relationship between the MdMYB1 allele and the fruit-bearing trait in apple. More work is needed to determine whether and how the MdMYB1 gene or a gene linked to the MdMYB1-2 allele influences the flowering trait in perennial apple trees, and whether flowering in other plants is influenced by related genes. © 2014, Springer-Verlag Berlin Heidelberg.

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