This page has only limited features, please log in for full access.

Dr. Tahir Mahmood
State Key Laboratory of Cotton Biology, Institute of Cotton Research (ICR), Chinese Academy of Agricultural Sciences (CAAS), Anyang 455000, China

Basic Info

Basic Info is private.

Research Keywords & Expertise

0 Plant Stress Physiology
0 Genome Wide Association Study
0 plant molecular breeding
0 cotton breeding
0 Cotton molecular biology

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 24 June 2021 in Plants
Reads 0
Downloads 0

Pepper is one of the most important vegetables and spices in the world. Principal pungency is contributed by secondary metabolites called capsaicinoids, mainly synthesized in the placenta of pepper fruit. Various factors, including drought, limit pepper production. Flowering is one of the most sensitive stages affected by drought stress. The current study was conducted to determine the effect of drought on different pepper genotypes at the flowering and pod formation stages. Hot pepper (Pusajuala and Ghotki) and Bell pepper (Green Wonder and PPE-311) genotypes were subjected to drought (35% field capacity) at two different stages (flowering (DF) and pod formation (DP) stage). In comparison, control plants were maintained at 65% field capacity. The data regarding flowering survival rates, antioxidant protein activity, and proline content, were collected. Results indicated that parameters like flower survival percentage, number of fruits per plant, and fruit weight had significant differences among the genotypes in both treatments. A high proline level was observed in Green Wonder at the pod formation stage compared to other genotypes. Capsaicin contents of hot pepper genotypes were affected at the pod formation stage. Antioxidants like GPX were highly active (190 units) in Ghotki at pod formation. Bell pepper genotypes had a high APX activity, highly observed (100 units) in PPE-311 at pod formation, and significantly differ from hot pepper genotypes. In the catalase case, all the genotypes had the highest values in DP compared to control and DF, but Pusajuala (91 units) and Green Wonder (83 units) performed best compared to other genotypes. Overall, the results indicate that drought stress decreased reproductive growth parameters and pungency of pepper fruit as most of the plant energy was consumed in defense molecules (antioxidants). Therefore, water availability at the flowering and pod formation stage is critical to ensure good yield and pepper quality.

ACS Style

Tahir Mahmood; Rashid Rana; Sunny Ahmar; Saima Saeed; Asma Gulzar; Muhammad Khan; Fahad Wattoo; Xiukang Wang; Ferdinando Branca; Freddy Mora-Poblete; Gabrielle Mafra; Xionming Du. Effect of Drought Stress on Capsaicin and Antioxidant Contents in Pepper Genotypes at Reproductive Stage. Plants 2021, 10, 1286 .

AMA Style

Tahir Mahmood, Rashid Rana, Sunny Ahmar, Saima Saeed, Asma Gulzar, Muhammad Khan, Fahad Wattoo, Xiukang Wang, Ferdinando Branca, Freddy Mora-Poblete, Gabrielle Mafra, Xionming Du. Effect of Drought Stress on Capsaicin and Antioxidant Contents in Pepper Genotypes at Reproductive Stage. Plants. 2021; 10 (7):1286.

Chicago/Turabian Style

Tahir Mahmood; Rashid Rana; Sunny Ahmar; Saima Saeed; Asma Gulzar; Muhammad Khan; Fahad Wattoo; Xiukang Wang; Ferdinando Branca; Freddy Mora-Poblete; Gabrielle Mafra; Xionming Du. 2021. "Effect of Drought Stress on Capsaicin and Antioxidant Contents in Pepper Genotypes at Reproductive Stage." Plants 10, no. 7: 1286.

Journal article
Published: 04 June 2021 in Plants
Reads 0
Downloads 0

Photosynthesis as a source is a significant contributor to the reproductive sink affecting cotton yield and fiber quality. Moreover, carbon assimilation from subtending leaves adds up a significant proportion to the reproductive sink. Therefore, this study aimed to address the source-sink relationship of boll subtending leaf with fiber quality and yield related traits in upland cotton. A core collection of 355 upland cotton accessions was subjected to subtending leaf removal treatment effects across 2 years. The analysis of variance suggested a significant effect range in the source-sink relationship under subtending leaf removal effects at different growth stages. Further insight into the variation was provided by the correlation analysis and principal component analysis. A significant positive correlation between different traits was observed and the multivariate analysis including hierarchical clustering and principal component analysis (PCA) categorised germplasm accessions into three groups on the basis of four subtending leaf removal treatment effects across 2 years. A set of genotypes with the lowest and highest treatment effects has been identified. Selected accessions and the outcome of the current study may provide a basis for a further study to explore the molecular mechanism of source-sink relationship of boll subtending leaf and utilization of breeding programs focused on cotton improvement.

ACS Style

Naimatullah Mangi; Mian Nazir; Xiaoyan Wang; Muhammad Iqbal; Zareen Sarfraz; Ghulam Jatoi; Tahir Mahmood; QiFeng Ma; Fan Shuli. Dissecting Source-Sink Relationship of Subtending Leaf for Yield and Fiber Quality Attributes in Upland Cotton (Gossypium hirsutum L.). Plants 2021, 10, 1147 .

AMA Style

Naimatullah Mangi, Mian Nazir, Xiaoyan Wang, Muhammad Iqbal, Zareen Sarfraz, Ghulam Jatoi, Tahir Mahmood, QiFeng Ma, Fan Shuli. Dissecting Source-Sink Relationship of Subtending Leaf for Yield and Fiber Quality Attributes in Upland Cotton (Gossypium hirsutum L.). Plants. 2021; 10 (6):1147.

Chicago/Turabian Style

Naimatullah Mangi; Mian Nazir; Xiaoyan Wang; Muhammad Iqbal; Zareen Sarfraz; Ghulam Jatoi; Tahir Mahmood; QiFeng Ma; Fan Shuli. 2021. "Dissecting Source-Sink Relationship of Subtending Leaf for Yield and Fiber Quality Attributes in Upland Cotton (Gossypium hirsutum L.)." Plants 10, no. 6: 1147.

Journal article
Published: 25 May 2021 in Sustainability
Reads 0
Downloads 0

Stem reserves in grain crops are considered important in grain filling under post-anthesis stress in the absence/low availability of photosynthetic assimilates. Considerable variation is present among genotypes for stem reserve translocation in wheat. Therefore, this study aimed to exploit the phenotypic variation for stem reserve translocation in wheat under control and chemically induced stress conditions. The phenotypic variation among six parents and their corresponding direct cross combinations was evaluated under induced stress conditions. The results signify the presence of considerable variation between treatments, genotypes, and treatment-genotype interactions. The parent LLR-20 depicted the highest translocation of dry matter and contribution of post-anthesis assimilates under induced-stress conditions. Similarly, cross combinations Nacozari × LLR22, Nacozari × LLR 20, Nacozari × Parula, Nacozari × LLR 21, LLR 22 × LLR 21, and LLR 20 × LLR 21 showed higher source-sink accumulation under induced-stress conditions. The selected parents and cross combinations can be further utilized in the breeding program to strengthen the genetic basis for stress tolerance in wheat.

ACS Style

Mian Nazir; Zareen Sarfraz; Naimatullah Mangi; Muhammad Nawaz Shah; Talat Mahmood; Tahir Mahmood; Muhammad Iqbal; Muhammad Ishaq Asif Rehmani; Mohamed El-Sharnouby; Mohamed Shabaan; Sobhy Sorour; Ayman EL Sabagh. Post-Anthesis Mobilization of Stem Assimilates in Wheat under Induced Stress. Sustainability 2021, 13, 5940 .

AMA Style

Mian Nazir, Zareen Sarfraz, Naimatullah Mangi, Muhammad Nawaz Shah, Talat Mahmood, Tahir Mahmood, Muhammad Iqbal, Muhammad Ishaq Asif Rehmani, Mohamed El-Sharnouby, Mohamed Shabaan, Sobhy Sorour, Ayman EL Sabagh. Post-Anthesis Mobilization of Stem Assimilates in Wheat under Induced Stress. Sustainability. 2021; 13 (11):5940.

Chicago/Turabian Style

Mian Nazir; Zareen Sarfraz; Naimatullah Mangi; Muhammad Nawaz Shah; Talat Mahmood; Tahir Mahmood; Muhammad Iqbal; Muhammad Ishaq Asif Rehmani; Mohamed El-Sharnouby; Mohamed Shabaan; Sobhy Sorour; Ayman EL Sabagh. 2021. "Post-Anthesis Mobilization of Stem Assimilates in Wheat under Induced Stress." Sustainability 13, no. 11: 5940.

Journal article
Published: 03 April 2021 in Agronomy
Reads 0
Downloads 0

Keeping in view the yield losses instigated by heat stress in several crops, we carried out an experiment to explore the curative effect of exogenous applications of proline on the morpho-physiological, biochemical, and water-related attributes of okra genotypes under high-temperature stress (controlled conditions). Four contrasting genotypes C1, C2, C3, and C4 heat tolerant and heat sensitive genotypes were selected from a diverse panel of okra genotypes (n = 100) to examine plant responses to high-temperature stress and exogenous application of proline. Four-week-old seedlings were subjected to heat stress by gradually increasing the temperature of a growth chamber from 28/22 °C to 45/35 °C (day/night) and sprayed with an optimized proline concentration 2.5 mM. The experiment consisted of a factorial arrangement of treatments in a completely randomized design. The results showed that there were maximum increases in shoot length (32.7%), root length (58.9%), and shoot fresh (85.7%). The quantities of leaves per plant were increased by 52.9%, 123.6%, 82.5%, and 62.2% in C1, C2, C3, and C4 after proline application. On the other hand, only root fresh weight decreased in all genotypes after proline application by 23.1%, 20%, 266.7%, and 280.8% (C1, C2, C3, C4). A lower leaf temperature of 27.72 °C, minimum transpiration of 3.29 mmol m−2 s−1, maximum photosynthesis of 3.91 μmol m−2 s−1, and a maximum water use efficiency of 1.20 μmol CO2 mmol H2O were recorded in the genotypes C2, C1, C3, and C4, respectively. The highest enzymatic activity of superoxide dismutase, peroxidase and catalase were 14.88, 0.31, and 0.15 U mg-protein in C2, C1, and C3, respectively. Maximum leaf proline, glycinebetaine, total free amino acids, and chlorophyll content 3.46 mg g−1, 4.02 mg g−1, 3.46 mg g−1, and 46.89 (in C2), respectively, due to foliar applications of proline. Another important finding was that heat tolerance in okra was highly linked highly linked to genotypes’ genetic potential, having more water use efficiency, enzymatic activities, and physio-biochemical attributes under the foliar applications of proline.

ACS Style

Rashid Hussain; Choudhary Ayyub; Muhammad Shaheen; Sahar Rashid; Muhammad Nafees; Saif Ali; Madiha Butt; Mujahid Ali; Ambreen Maqsood; Sajid Fiaz; Sunny Ahmar; Tahir Mahmood; Freddy Mora-Poblete. Regulation of Osmotic Balance and Increased Antioxidant Activities under Heat Stress in Abelmoschus esculentus L. Triggered by Exogenous Proline Application. Agronomy 2021, 11, 685 .

AMA Style

Rashid Hussain, Choudhary Ayyub, Muhammad Shaheen, Sahar Rashid, Muhammad Nafees, Saif Ali, Madiha Butt, Mujahid Ali, Ambreen Maqsood, Sajid Fiaz, Sunny Ahmar, Tahir Mahmood, Freddy Mora-Poblete. Regulation of Osmotic Balance and Increased Antioxidant Activities under Heat Stress in Abelmoschus esculentus L. Triggered by Exogenous Proline Application. Agronomy. 2021; 11 (4):685.

Chicago/Turabian Style

Rashid Hussain; Choudhary Ayyub; Muhammad Shaheen; Sahar Rashid; Muhammad Nafees; Saif Ali; Madiha Butt; Mujahid Ali; Ambreen Maqsood; Sajid Fiaz; Sunny Ahmar; Tahir Mahmood; Freddy Mora-Poblete. 2021. "Regulation of Osmotic Balance and Increased Antioxidant Activities under Heat Stress in Abelmoschus esculentus L. Triggered by Exogenous Proline Application." Agronomy 11, no. 4: 685.

Journal article
Published: 15 September 2020 in Plants
Reads 0
Downloads 0

Interrogations of local germplasm and landraces can offer a foundation and genetic basis for drought tolerance in wheat. Potential of drought tolerance in a panel of 30 wheat genotypes including varieties, local landraces, and wild crosses were explored under drought stress (DS) and well-watered (WW) conditions. Considerable variation for an osmotic adjustment (OA) and yield components, coupled with genotype and environment interaction was observed, which indicates the differential potential of wheat genotypes under both conditions. Reduction in yield per plant (YP), thousand kernel weight (TKW), and induction of OA was detected. Correlation analysis revealed a strong positive association of YP with directly contributing yield components under both environments, indicating the impotence of these traits as a selection-criteria for the screening of drought-tolerant genotypes for drylands worldwide. Subsequently, the association of OA with TKW which contributes directly to YP, indicates that wheat attains OA to extract more water from the soil under low water-potential. Genotypes including WC-4, WC-8 and LLR-29 showed more TKW under both conditions, among them; LLR-29 also has maximum OA and batter yield comparatively. Result provides insight into the role of OA in plant yield sustainability under DS. In this study, we figure out the concept of OA and its incredible role in sustainable plant yield in wheat.

ACS Style

Tahir Mehmood; Muhammad Abdullah; Sunny Ahmar; Muhammad Yasir; Muhammad Iqbal; Muhmmad Yasir; Shoaib Rehman; Sulaiman Ahmed; Rashid Rana; Abdul Ghafoor; Muhammad Shah; Xiongming Du; Freddy Mora-Poblete. Incredible Role of Osmotic Adjustment in Grain Yield Sustainability under Water Scarcity Conditions in Wheat (Triticum aestivum L.). Plants 2020, 9, 1208 .

AMA Style

Tahir Mehmood, Muhammad Abdullah, Sunny Ahmar, Muhammad Yasir, Muhammad Iqbal, Muhmmad Yasir, Shoaib Rehman, Sulaiman Ahmed, Rashid Rana, Abdul Ghafoor, Muhammad Shah, Xiongming Du, Freddy Mora-Poblete. Incredible Role of Osmotic Adjustment in Grain Yield Sustainability under Water Scarcity Conditions in Wheat (Triticum aestivum L.). Plants. 2020; 9 (9):1208.

Chicago/Turabian Style

Tahir Mehmood; Muhammad Abdullah; Sunny Ahmar; Muhammad Yasir; Muhammad Iqbal; Muhmmad Yasir; Shoaib Rehman; Sulaiman Ahmed; Rashid Rana; Abdul Ghafoor; Muhammad Shah; Xiongming Du; Freddy Mora-Poblete. 2020. "Incredible Role of Osmotic Adjustment in Grain Yield Sustainability under Water Scarcity Conditions in Wheat (Triticum aestivum L.)." Plants 9, no. 9: 1208.

Review
Published: 31 December 2019 in Cells
Reads 0
Downloads 0

Drought stress restricts plant growth and development by altering metabolic activity and biological functions. However, plants have evolved several cellular and molecular mechanisms to overcome drought stress. Drought tolerance is a multiplex trait involving the activation of signaling mechanisms and differentially expressed molecular responses. Broadly, drought tolerance comprises two steps: stress sensing/signaling and activation of various parallel stress responses (including physiological, molecular, and biochemical mechanisms) in plants. At the cellular level, drought induces oxidative stress by overproduction of reactive oxygen species (ROS), ultimately causing the cell membrane to rupture and stimulating various stress signaling pathways (ROS, mitogen-activated-protein-kinase, Ca2+, and hormone-mediated signaling). Drought-induced transcription factors activation and abscisic acid concentration co-ordinate the stress signaling and responses in cotton. The key responses against drought stress, are root development, stomatal closure, photosynthesis, hormone production, and ROS scavenging. The genetic basis, quantitative trait loci and genes of cotton drought tolerance are presented as examples of genetic resources in plants. Sustainable genetic improvements could be achieved through functional genomic approaches and genome modification techniques such as the CRISPR/Cas9 system aid the characterization of genes, sorted out from stress-related candidate single nucleotide polymorphisms, quantitative trait loci, and genes. Exploration of the genetic basis for superior candidate genes linked to stress physiology can be facilitated by integrated functional genomic approaches. We propose a third-generation sequencing approach coupled with genome-wide studies and functional genomic tools, including a comparative sequenced data (transcriptomics, proteomics, and epigenomic) analysis, which offer a platform to identify and characterize novel genes. This will provide information for better understanding the complex stress cellular biology of plants.

ACS Style

Tahir Mahmood; Shiguftah Khalid; Muhammad Abdullah; Zubair Ahmed; Muhammad Kausar Nawaz Shah; Abdul Ghafoor; Xiongming Du. Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance. Cells 2019, 9, 105 .

AMA Style

Tahir Mahmood, Shiguftah Khalid, Muhammad Abdullah, Zubair Ahmed, Muhammad Kausar Nawaz Shah, Abdul Ghafoor, Xiongming Du. Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance. Cells. 2019; 9 (1):105.

Chicago/Turabian Style

Tahir Mahmood; Shiguftah Khalid; Muhammad Abdullah; Zubair Ahmed; Muhammad Kausar Nawaz Shah; Abdul Ghafoor; Xiongming Du. 2019. "Insights into Drought Stress Signaling in Plants and the Molecular Genetic Basis of Cotton Drought Tolerance." Cells 9, no. 1: 105.