Mukhtar Ahmed^1,*, Ahmed M. S. Kheir^2,3, Muhammad Zeeshan Mehmood¹, Shakeel Ahmad⁴, Mirza Hasanuzzaman^5,*

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,… More >

Huaqiao Ding^*, Lihui Mao, Qingcheng Zou, Wei Hu, Xuerui Cao, Qing Dong^*

Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 773-789, 2022, DOI:10.32604/phyton.2022.018075

Abstract Snapdragon (Antirrhinum majus) is one of the most widely cultivated grass flowers in the world. WRKY transcription factors, VQ proteins and their interactions play crucial roles in plant response to abiotic stresses. However, little is known about WRKY and VQ gene families in snapdragon. In the present study, WRKY and VQ genes and their interactions were comprehensively analyzed in snapdragon using bioinformatics approaches, and their expression in response to drought and cold stresses was examined using real-time PCR. A total of 67 AmWRKY genes were identified in snapdragon, which were classified into different groups or subgroups based on phylogenetic… More >

M. Rafiqul Islam^1,*, M. Shahinur Islam¹, Nurunnaher Akter¹, Mohammed Mohi-Ud-Din², Mohammad Golam Mostofa^3,4,*

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… More >

Ping Zhang¹, Zhiyou Kong², Junna Liu¹, Yongjiang Liu¹, Qianchao Wang¹, Xiuju Huan¹, Li Li¹, Yunfeng Jiang³, Peng Qin^1,*

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… More >

XIAOFEN CHENG¹, ABEER HASHEM^2,3, ELSAYED FATHI ABD_ALLAH⁴, QIANGSHENG WU^1,5,*, KAMIL KUČA^5,*

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… More >

Yujie Yang¹, Chengshi Huang², Zuguo Ge³, Bengeng Zhou⁴, Guangju Su⁴, Chunling Liu⁴, Yongjun Fei^1,*

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,… More >

Karpagam Sundararajan¹, Lalit Garg^2,*, Kathiravan Srinivasan^4,*, Ali Kashif Bashir³, Jayakumar Kaliappan⁴, Ganapathy Pattukandan Ganapathy⁵, Senthil Kumaran Selvaraj⁶, T. Meena⁷

CMES-Computer Modeling in Engineering & Sciences, Vol.128, No.2, pp. 447-487, 2021, DOI:10.32604/cmes.2021.015528

Abstract Drought is the least understood natural disaster due to the complex relationship of multiple contributory factors. Its beginning and end are hard to gauge, and they can last for months or even for years. India has faced many droughts in the last few decades. Predicting future droughts is vital for framing drought management plans to sustain natural resources. The data-driven modelling for forecasting the metrological time series prediction is becoming more powerful and flexible with computational intelligence techniques. Machine learning (ML) techniques have demonstrated success in the drought prediction process and are becoming popular to More >

Md. Rezwan Molla^1,2,4, Md. Motiar Rohman^2,*, Mahmuda Binte Monsur², Mirza Hasanuzzaman^3,*, Lutful Hassan⁴

Phyton-International Journal of Experimental Botany, Vol.90, No.5, pp. 1425-1443, 2021, DOI:10.32604/phyton.2021.015591

Abstract This study was undertaken to investigate oxidative stress tolerant mechanisms in chilli (Capsicum annuum L.) under drought genotypes through evaluating morphological, physiological, biochemical and stomatal parameters. Twenty genotypes were evaluated for their genetic potential to drought stress tolerant at seedling stage. Thirty days old seedlings were exposed to drought stress induced by stop watering for the following 10 days and rewatering for the following one week as recovery. Based on their survival performance, two tolerant genotypes viz. BD-10906 and BD-109012 and two susceptible genotypes viz. BD-10902 and RT-20 were selected for studying the oxidative stress tolerance… More >

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… More >

Abdul Awal Chowdhury Masud¹, Md. Fazlul Karim¹, M. H. M. Borhannuddin Bhuyan², Jubayer Al Mahmud³, Kamrun Nahar⁴, Masayuki Fujita⁵, Mirza Hasanuzzaman^1,*

Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 353-372, 2021, DOI:10.32604/phyton.2021.013259

Abstract Drought is the most common form of abiotic stress that reduces plant growth and productivity. It causes plant injuries through elevated production of reactive oxygen species (ROS). Potassium (K) is a vital plant nutrient that notably ameliorates the detrimental effect of drought stress in the plant. A pot experiment was conducted at the Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Japan, under controlled environment of green house to explore the role of K in mitigating drought severity in wheat (Triticum asevitum L.) seedlings. Three days after germination, seedlings were exposed to three water… More >