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  • Grain Yield, Quality and 2-Acetyl-1-Pyrroline of Fragrant Rice in Response to Different Planting Seasons in South China
  • Abstract Climate conditions is an important factor affected the fragrant rice growth and development. In order to study the effects of different planting seasons on fragrant rice performance in South China, present study was conducted with three planting seasons (early season (April to July), middle season (June to September) and late season (August to November)) and three fragrant rice cultivars, ‘Basmati-385’, ‘Meixiangzhan-2’ and ‘Xiangyaxiangzhan’. The results showed that the highest grain yield and grain 2-acetyl-1-pyrroline (2-AP, key component of fragrant rice aroma) content were both recorded in late season treatment while the fragrant rice in middle season treatment produced the lowest…
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  • Differential Effects of Ammonium and Nitrate on Growth Performance of Glechoma longituba under Heterogeneous Cd Stress
  • Abstract Water, minerals, nutrients, etc., can be shared by physiological integration among inter-connected ramets of clonal plants. Nitrogen plays an important role in alleviating cadmium (Cd) stress for clonal plants. But how different forms of nitrogen affect growth performance of clonal plants subjected to heterogeneous Cd stress still remains poorly understood. A pot experiment was conducted to investigate the differential effects of ammonium and nitrate on growth performance of Glechoma longituba under heterogeneous Cd stress. In the experiment, parent ramets of Glechoma longituba clonal fragments were respectively supplied with modified Hoagland solution containing 7.5 mM ammonium, 7.5 mM nitrate or the…
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  • Location Distribution Characteristics in Leaf Lateral Asymmetry of Hybrid Indica Rice
  • Abstract Rice leaves show lateral asymmetry. Differences in width, thickness, chlorophyll meter readings, nitrogen content, density, and yield on each asymmetrical have been reported. However, limited information is available on the distribution characteristics of the smooth side (SS) and rough side (RS) of rice leaves. The SS of rice leaves can be divided into two types according to its location in leaf: one is the smooth side appearing on the left (SSAL) of the leaf, while the smooth side of the other type appears on the right (SSAR). Through the investigation of four rice varieties, we identified that the proportion of…
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  • Carbon Monoxide Signal Breaks Primary Seed Dormancy by Transcriptional Silence of DOG1 in Arabidopsis thaliana
  • Abstract Primary seed dormancy is an adaptive strategy that prevents germination for viable seeds in harsh environment, ensuring seeds germination under favorable condition. Accurately inducing seeds germination in a controllable manner is important for crop production. Thus searching the chemicals that efficiently breaks seed dormancy is valuable. DOG1 protein abundance in the freshly harvested seed is high, and its level is correlated to seed dormancy intensity, thus DOG1 is regarded as the timer to evaluate the seed dormancy degree. In this study, we found the carbon monoxide (CO) donor treatment, the transgenic line with high CO content, showed lower seed dormancy,…
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  • GABA Enhances Thermotolerance of Seeds Germination by Attenuating the ROS Damage in Arabidopsis
  • Abstract Seeds germination is strictly controlled by environment factor such as high temperature (HT) through altering the balance between gibberellin acid (GA) and abscisic acid (ABA). Gama-aminobutyric acid (GABA) is a small molecule with four-carbon amino acid, which plays a crucial role during plant physiological process associated with pollination, wounding or abiotic stress, but its role in seeds germination under HT remains elusive. In this study we found that HT induced the overaccumulation of ROS, mainly H2O2 and O2- , to suppress seeds germination, meanwhile, HT also activated the enzyme activity of GAD for the rapid accumulation of GABA, hinting the…
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  • Physiological Responses of Dendrobium officinale under Exposure to Cold Stress with Two Cultivars
  • Abstract This study aimed to explore the cold tolerance of two cultivars of Dendrobium officinale (MG1, MG2) grown in different regions of China. Under -2°C incubation, cultivar MG1 remained active after 3 d, and continued to grow after returning to room temperature. However, MG2 could only maintain its activity after 2 d treatment at −2°C, and the seedlings died with the low temperature treatment time. Investigation of the characteristics of the plants grown in the south (Hangzhou) or north (Zhengzhou) of China indicated that the leaves of MG1 also had reduced stomatal density, the highest thickness, and a compact microstructure. The…
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  • High-Throughput MicroRNA and mRNA Sequencing Reveals that MicroRNAs May Be Involved in Pectinesterase-Mediated Cold Resistance in Potato
  • Abstract Since potato cultivars are sensitive to low temperature, cold injury severely affects the geographical distribution and yield of potato. Although some miRNAs have been identified in response to cold stress in plants, there is no report about the role of miRNAs in the response to cold stress in potato. Here, via high throughput sequencing, we described the profiling of cold stress response to miRNA and mRNA in potato. Two small RNA and six mRNA libraries were constructed and sequenced. 296 known and 211 novel miRNAs were identified, in which 34 miRNAs in Cold Group (CG) had the higher expression quantity…
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  • Salt-Induced Changes in Physio-Biochemical and Antioxidant Defense System in Mustard Genotypes
  • Abstract Salinity stress is a major factor limiting plant growth and productivity of many crops including oilseed. The present study investigated the identification of salt tolerant mustard genotypes and better understanding the mechanism of salinity tolerance. Salt stresses significantly reduced relative water content (RWC), chlorophyll (Chl) content, K+ and K+ /Na+ ratio, photosynthetic rate (PN), transpiration rate (Tr), stomatal conductance (gs), intercellular CO2 concentration (Ci) and increased the levels of proline (Pro) and lipid peroxidation (MDA) contents, Na+ , superoxide (O2•− ) and hydrogen peroxide (H2O2) in both tolerant and sensitive mustard genotypes. The tolerant genotypes maintained higher Pro and lower…
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  • Effects of Multi-Stage Continuous Drought on Photosynthetic Characteristics, Yield and Water Use Efficiency of Winter Wheat
  • Abstract A drought event can cause entire crops to fail or yield loss. In order to study the effects of continuous drought on photosynthetic characteristics, yield, and water use efficiency (WUE) of winter wheat (Triticum aestivum L.), the winter wheat variety “Aikang 58” was selected as test material with controlling the water of the pot-planted winter wheat under a mobile rainout shelter. Based on foot planting and safe wintering, winter wheat was evaluated under different drought conditions, including light, moderate and severe drought at the jointing (B), heading (C), and filling (G) stages. The soil water content was controlled in a…
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