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  • Open Access

    ARTICLE

    Mycorrhiza improves plant growth and photosynthetic characteristics of tea plants in response to drought stress

    FENGJUN DAI1, ZIYI RONG1, QIANGSHENG WU1, ELSAYED FATHI ABD_ALLAH3, CHUNYAN LIU1,2,*, SHENGRUI LIU2,*

    BIOCELL, Vol.46, No.5, pp. 1339-1346, 2022, DOI:10.32604/biocell.2022.018909

    Abstract Tea plants are sensitive to soil moisture deficit, with the level of soil water being a critical factor affecting their growth and quality. Arbuscular mycorrhizal fungi (AMF) can improve water and nutrient absorption, but it is not clear whether AMF can improve the photosynthetic characteristics of tea plants. A potted study was conducted to determine the effects of Claroideoglomus etunicatum on plant growth, leaf water status, pigment content, gas exchange, and chlorophyll fluorescence parameters in Camellia sinensis cv. Fuding Dabaicha under well-watered (WW) and drought stress (DS) conditions. Root mycorrhizal colonization and soil hyphal length were significantly reduced by the… More >

  • Open Access

    ARTICLE

    Changes in Germination and Seedling Traits of Sesame under Simulated Drought

    Mukhtar Ahmed1,*, Ahmed M. S. Kheir2,3, Muhammad Zeeshan Mehmood1, Shakeel Ahmad4, Mirza Hasanuzzaman5,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 713-726, 2022, DOI:10.32604/phyton.2022.018552

    Abstract Drought is considered one of the leading abiotic constraints to agricultural crop production globally. Present study was conducted to assess the effects of different drought treatments (viz. Control, 10% PEG, and 20% PEG) on seed germination, germination indices, seedling traits, and drought tolerance indices of sesame. Our results showed that maximum reduction in the studied parameters was observed at higher PEG concentration (i.e., 20% PEG). As compared to control, the drought treatments viz. 10% and 20% PEG decreased the values for germination indices, such as germination percentage, coefficient of variation of germination time, germination index, and seedling vigor index. Similarly,… More >

  • Open Access

    ARTICLE

    Foliar Application of Cytokinin Modulates Gas Exchange Features, Water Relation and Biochemical Responses to Improve Growth Performance of Maize under Drought Stress

    M. Rafiqul Islam1,*, M. Shahinur Islam1, Nurunnaher Akter1, Mohammed Mohi-Ud-Din2, Mohammad Golam Mostofa3,4,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.3, pp. 633-649, 2022, DOI:10.32604/phyton.2022.018074

    Abstract Improvement of plant performance under drought stress is crucial to sustaining agricultural productivity. The current study investigated the ameliorative effects of foliar-applied kinetin, an adenine-type cytokinin (CK), on growth and gas exchange parameters, water relations and biochemical attributes of maize plants under drought stress. Eighteen-day-old maize plants were subjected to drought by maintaining soil moisture content at 25% field capacity for 8 days followed by foliar application of kinetin at 0, 75, 150 and 225 mg L−1 (CK0, CK75, CK150 and CK225, respectively) to the plants for two-times at the 9-day interval. Results revealed that drought stress markedly reduced stem diameter,… More >

  • Open Access

    ARTICLE

    Transcriptomic Analysis of the Tolerance Response to Dehydration and Rehydration in Wheat Seedlings

    Ping Zhang1, Zhiyou Kong2, Junna Liu1, Yongjiang Liu1, Qianchao Wang1, Xiuju Huan1, Li Li1, Yunfeng Jiang3, Peng Qin1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.2, pp. 375-394, 2022, DOI:10.32604/phyton.2022.016358

    Abstract Drought is the main abiotic stress that restricts wheat production. The rapid development of sequencing technology and its widespread application to various fields have revealed the structural characteristics and regulation of related genes through gene expression analysis. Here, we studied responses of wheat plants under drought and re-watering conditions, using morphological and physiological indicators. Moreover, a transcriptome analysis was conducted on Jingmai 12, a drought-resistant wheat strain, to explore the mechanism underlying the response of drought-resistant wheat seedlings to drought stress at the transcriptome level. Drought stress caused morphological and physiological changes in both drought-resistant and -sensitive varieties, but to… More >

  • Open Access

    ARTICLE

    Identification of PtGai (a DELLA protein) in trifoliate orange and expression patterns in response to drought stress

    XIAOFEN CHENG1, ABEER HASHEM2,3, ELSAYED FATHI ABD_ALLAH4, QIANGSHENG WU1,5,*, KAMIL KUČA5,*

    BIOCELL, Vol.45, No.6, pp. 1687-1694, 2021, DOI:10.32604/biocell.2021.017581

    Abstract Gibberellins (GAs) are an important hormone in regulating plant growth and development, and DELLA protein is an essential negative regulator of GA signal transduction. The aim of the study was to clone a GA-inhibiting protein DELLA from trifoliate orange (Poncirus trifoliata L. Raf.) and to analyze the bioinformations and expression patterns of the protein gene in tissues and in response to drought stress. A DELLA protein was isolated from trifoliate orange and named as PtGai (Genebank number: MZ170959). The PtGai protein had 1731 bp open reading frames, along with 576 amino acid codes, and also grouped with sweet orange (XM_006430552.4).… More >

  • Open Access

    ARTICLE

    Exogenous Glycine Betaine Reduces Drought Damage by Mediating Osmotic Adjustment and Enhancing Antioxidant Defense in Phoebe hunanensis

    Yujie Yang1, Chengshi Huang2, Zuguo Ge3, Bengeng Zhou4, Guangju Su4, Chunling Liu4, Yongjun Fei1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.1, pp. 129-148, 2022, DOI:10.32604/phyton.2022.016704

    Abstract Drought stress negatively impacts growth and physiological processes in plants. The foliar application of glycine betaine (GB) is an effective and low-cost approach to improve the drought tolerance of trees. This study examined the effect of exogenously applied GB on the cell membrane permeability, osmotic adjustment, and antioxidant enzyme activities of Phoebe hunanensis Hand.-Mazz under drought stress. Two levels (0 and 800 mL) of water irrigation were tested under different applied GB concentrations (0, 50, 100, and 200 mM). Drought stress decreased the relative water content by 58.5% while increased the electric conductivity, malondialdehyde, proline, soluble proteins, soluble sugars, and antioxidant… More >

  • Open Access

    ARTICLE

    Laboratory-and Field-Phenotyping for Drought Stress Tolerance and Diversity Study in Lentil (Lens culinaris Medik.)

    Shahida Akter, Israt Jahan, Md. Amir Hossain*, Mohammad Anwar Hossain*

    Phyton-International Journal of Experimental Botany, Vol.90, No.3, pp. 949-970, 2021, DOI:10.32604/phyton.2021.014411

    Abstract Drought susceptibility and low genetic variability are the major constraints of lentil (Lens culinaris Medik.) production worldwide. Development of an efficient pre-field drought phenotyping technique and identification of diversified drought tolerant lentil genotype(s) are therefore vital and necessary. Two separate experiments were conducted using thirty diverse lentil genotypes to isolate drought tolerant genotype(s) as well as to assess their diversity. In both of the experiments, significant (p ≤ 0.01) variation in genotype (G), treatment (T) and G X T was observed for most of the studied traits. In experiment I, genotypes were examined for drought tolerance at the seedlings stage… More >

  • Open Access

    ARTICLE

    Foliar Application of Phosphorus Enhances Photosynthesis and Biochemical Characteristics of Maize under Drought Stress

    Zahoor Ahmad1,2,*, Ejaz Ahmad Waraich3, Muhammad Zia ur Rehman4, Muhammad Ashar Ayub4, Muhammad Usman4, Hesham Alharby5, Atif Bamagoos5, Celaleddin Barutçular1, Muhammad Ali Raza6, Fatih Çiğ7, Ayman El Sabagh7,8,*

    Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 503-514, 2021, DOI:10.32604/phyton.2021.013588

    Abstract Water is essential for the growth period of crops; however, water unavailability badly affects the growth and physiological attributes of crops, which considerably reduced the yield and yield components in crops. Therefore, a pot experiment was conducted to investigate the effect of foliar phosphorus (P) on morphological, gas exchange, biochemical traits, and phosphorus use efficiency (PUE) of maize (Zea mays L.) hybrids grown under normal as well as water deficit situations at the Department of Agronomy, University of Agriculture Faisalabad, Pakistan in 2014. Two different treatments (control and P @ 8 kg ha−1 ) and four hybrids (Hycorn, 31P41, 65625,… More >

  • Open Access

    ARTICLE

    Polysaccharide Elicitor from the Endophyte Bionectria sp. Fat6 Improves Growth of Tartary Buckwheat under Drought Stress

    Dabing Xiang1, Wei Wei1, Yan Wan1, Xiaoyong Wu1, Xueling Ye1, Lianxin Peng1, Linyun Zhong2, Qi Wu1, Liang Zou1, Gang Zhao1,*, Jianglin Zhao1,*

    Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 461-473, 2021, DOI:10.32604/phyton.2021.011724

    Abstract Drought can limit the growth and reduce the yield of crops, but the safe and effective bio-approach to improve the drought resistance of crops is very little. We conducted an experiment in which we monitored the effects of polysaccharide from the endophyte Bionectria sp. Fat6 on the growth of Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn) seedlings under control and drought-stressed conditions by determining gas exchange, photosynthesis parameters, photosynthetic pigment contents, and metabolite accumulation. Results indicated that the polysaccharide from endophyte stimulated plant growth and increased the aboveground biomass, root mass, and root/shoot ratio of Tartary buckwheat. Application of the polysaccharide… More >

  • Open Access

    ARTICLE

    Alleviation of Drought Stress in Wheat Using Exogenous Ulva prolifera Extract Produced by Enzymatic Hydrolysis

    Feiyu Li1, Siqi Zuo1, Yongzhou Chi1, Chunying Du1, Zhaopeng Shen1, Xihong Han2,3, Xiaohui Wang2,*, Peng Wang1,*

    Journal of Renewable Materials, Vol.8, No.11, pp. 1519-1529, 2020, DOI:10.32604/jrm.2020.011453

    Abstract Drought is one of the major abiotic stresses that affect plant growth and reduce agricultural productivity. Use of algal extract as a biostimulant is gaining increased attention from researchers. This study aimed to investigate the potential of Ulva prolifera extract (UE) as a biostimulant when enzymatically extracted under conditions of water deficit. UE treatments (0.02%, 0.06%, and 0.1%) significantly improved the shoot length, root length, and dry weight of roots after 120 h of drought stress relative to that in treatment with the negative control. An increase in catalase (CAT) and peroxidase (POD) activity was also observed that resulted in… More >

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