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Ai Y, Chen Y, Wang N, Li J, Liu J, Shen L, Sun X, Han L, Chao Y. Overexpression of MtIPT gene enhanced drought tolerance and delayed leaf senescence of creeping bentgrass (Agrostis stolonifera L.). BMC PLANT BIOLOGY 2024; 24:734. [PMID: 39085786 PMCID: PMC11293197 DOI: 10.1186/s12870-024-05442-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Accepted: 07/22/2024] [Indexed: 08/02/2024]
Abstract
BACKGROUND Isopentenyltransferases (IPT) serve as crucial rate-limiting enzyme in cytokinin synthesis, playing a vital role in plant growth, development, and resistance to abiotic stress. RESULTS Compared to the wild type, transgenic creeping bentgrass exhibited a slower growth rate, heightened drought tolerance, and improved shade tolerance attributed to delayed leaf senescence. Additionally, transgenic plants showed significant increases in antioxidant enzyme levels, chlorophyll content, and soluble sugars. Importantly, this study uncovered that overexpression of the MtIPT gene not only significantly enhanced cytokinin and auxin content but also influenced brassinosteroid level. RNA-seq analysis revealed that differentially expressed genes (DEGs) between transgenic and wild type plants were closely associated with plant hormone signal transduction, steroid biosynthesis, photosynthesis, flavonoid biosynthesis, carotenoid biosynthesis, anthocyanin biosynthesis, oxidation-reduction process, cytokinin metabolism, and wax biosynthesis. And numerous DEGs related to growth, development, and stress tolerance were identified, including cytokinin signal transduction genes (CRE1, B-ARR), antioxidase-related genes (APX2, PEX11, PER1), Photosynthesis-related genes (ATPF1A, PSBQ, PETF), flavonoid synthesis genes (F3H, C12RT1, DFR), wax synthesis gene (MAH1), senescence-associated gene (SAG20), among others. CONCLUSION These findings suggest that the MtIPT gene acts as a negative regulator of plant growth and development, while also playing a crucial role in the plant's response to abiotic stress.
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Affiliation(s)
- Ye Ai
- School of Grassland Science of Beijing Forestry University, Beijing, China
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China
- UWA School of Agriculture and Environment, The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
| | - Yinglong Chen
- UWA School of Agriculture and Environment, The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
| | - Ning Wang
- Shenzhen Tidyfield System Biotechnology Co., Ltd, Shenzhen, China
| | - Jiaxing Li
- School of Grassland Science of Beijing Forestry University, Beijing, China
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China
| | - Jinnan Liu
- School of Grassland Science of Beijing Forestry University, Beijing, China
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China
| | - Liangying Shen
- School of Grassland Science of Beijing Forestry University, Beijing, China
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China
| | - Xinbo Sun
- College of Agronomy, State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, China
| | - Liebao Han
- School of Grassland Science of Beijing Forestry University, Beijing, China.
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China.
| | - Yuehui Chao
- School of Grassland Science of Beijing Forestry University, Beijing, China.
- Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing, China.
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Kaya C, Shabala S. Melatonin improves drought stress tolerance of pepper ( Capsicum annuum) plants via upregulating nitrogen metabolism. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:NULL. [PMID: 37263757 DOI: 10.1071/fp23060] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/13/2023] [Indexed: 06/03/2023]
Abstract
While ameliorating effects of melatonin (MT) on abiotic stress tolerance in plants are widely reported, the mechanism that underlies this process remains elusive. This work investigated mechanisms by which MT improved drought tolerance in pepper (Capsicum annuum ) plants. A foliar spray of 0.1mM MT treatment was applied to plants grown at 80% and 40% of full field capacity for 3days. Drought stress caused a significant decrease in plant dry weight, relative water content, leaf water potential, PSII efficiency (F v /F m ratio), chlorophyll, soluble protein, leaf and root nitrogen content. Drought increased hydrogen peroxide, malondialdehyde (MDA), nitrate, ammonium, free amino acids, soluble sugars, proline and glycine betaine. Drought also increased peroxidase (POD), glutathione S-transferase (GST) and catalase (CAT) activities, electrolyte leakage (EL) and methylglyoxal (MG). MT pre-treatment reduced oxidative stress and improved nitrogen metabolism by activating various enzymes such as nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthetase (GOGAT) and glutamine dehydrogenase (GDH) activities. It also activated enzymes related to the glyoxalase system (Gly I and Gly II) and decreased NO3 - , NH4 + and free amino acid content. Our study suggests a cost-effective and sustainable solution to improve crop productivity in water-limited conditions, by enhancing plant growth, photosynthesis and nitrogen content.
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Affiliation(s)
- Cengiz Kaya
- Soil Science and Plant Nutrition Department, Agriculture Faculty, Harran University, Sanliurfa, Turkey
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tas., Australia; and School of Biological Science, University of Western Australia, Crawley, WA, Australia; and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
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Ferchichi Y, Rouz S, Mhara YB, Elimem M, Aranjuelo I, Soba D. Medicago sativa and M. tunetana reveal contrasting physiological and metabolic responses to drought. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153885. [PMID: 36470037 DOI: 10.1016/j.jplph.2022.153885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Alfalfa production is frequently constrained by drought, indicating the importance of assessing species biodiversity in endemic close relatives to enhance forage production under future global change conditions. In the present study, plants of two ecotypes of M. tunetana, native to Tunisia, and four commercial cultivars of M. sativa were subjected to two water regimes (control vs drought [15% field capacity]). Physiological, isotopic and metabolic analyses were used to characterize leaf and nodule profiles of the plants. Biomass, gas exchange and the maximum carboxylation rate (Vcmax) indicated significant decreases in photosynthetic capacity under drought in M. sativa cultivars. However, M. tunetana ecotypes maintained photosynthetic performance and aboveground biomass under drought conditions. Furthermore, nitrogen isotope composition (δ15N) in nodules and leaves was significantly decreased, which reveals a reduction in the N2 fixing activity of nodules under drought conditions that was not translated into lower leaf N content but was probably due to lower N demand. Analyses of starch, soluble sugar, and amino acid content in leaves and nodules have clearly proven the ability of Medicago spp. cultivars to increase the accumulation of osmo-protectors under drought. This study demonstrated the genetic variability of the strategy adopted among the studied cultivars in response to drought. In this sense, M. tunetana, and in part the M. sativa cultivar adapted to Mediterranean conditions, seem capable of maintaining adequate biomass, photosynthesis and biological N2 fixation in comparison to the other M. sativa cultivars.
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Affiliation(s)
- Yosr Ferchichi
- Laboratory of Agriculture Production Systems and Sustainable Development (LR03AGR02), Department of Agricultural Production, Higher School of Agriculture of Mograne, University of Carthage, Mograne-Zaghouan, 1121, Tunisia; National Institute of Agronomy of Tunisia, University of Carthage, Tunis, 1082, Tunisia
| | - Slim Rouz
- Laboratory of Agriculture Production Systems and Sustainable Development (LR03AGR02), Department of Agricultural Production, Higher School of Agriculture of Mograne, University of Carthage, Mograne-Zaghouan, 1121, Tunisia
| | - Yosr Ben Mhara
- Laboratory of Agriculture Production Systems and Sustainable Development (LR03AGR02), Department of Agricultural Production, Higher School of Agriculture of Mograne, University of Carthage, Mograne-Zaghouan, 1121, Tunisia; National Institute of Agronomy of Tunisia, University of Carthage, Tunis, 1082, Tunisia
| | - Mohamed Elimem
- Laboratory of Agriculture Production Systems and Sustainable Development (LR03AGR02), Department of Agricultural Production, Higher School of Agriculture of Mograne, University of Carthage, Mograne-Zaghouan, 1121, Tunisia
| | - Iker Aranjuelo
- Instituto de Agrobiotecnología (IdAB), Consejo Superior de Investigaciones Científicas (CSIC)-Gobierno de Navarra, Avenida Pamplona 123, 31192, Mutilva, Spain
| | - David Soba
- Instituto de Agrobiotecnología (IdAB), Consejo Superior de Investigaciones Científicas (CSIC)-Gobierno de Navarra, Avenida Pamplona 123, 31192, Mutilva, Spain.
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Gao Y, Cai C, Yang Q, Quan W, Li C, Wu Y. Response of Bletilla striata to Drought: Effects on Biochemical and Physiological Parameter Also with Electric Measurements. PLANTS 2022; 11:plants11172313. [PMID: 36079696 PMCID: PMC9460583 DOI: 10.3390/plants11172313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 11/16/2022]
Abstract
In heterogeneous landscapes with temporary water deficit characteristics in southwestern China, understanding the electrophysiological and morphological characteristics of Bletilla striata under different water conditions can help to better evaluate its suitability for planting plants in specific locations and guide planting and production. Using B. striata seedlings as experimental materials, the maximum field capacity (FC) was 75–80% (CK: control group), 50–60% FC (LS: light drought stress), 40–45% FC (MS: moderate drought stress), and 30–35% FC (SS: severe drought stress). In terms of physiological response, the activities of peroxidase (POD) and catalase (CAT) decreased under drought conditions, but the activity was well under the LS treatment, and the contents of proline (Pro) and malondialdehyde (MDA) increased. In terms of morphological responses, under drought conditions, root lengths of the rhizomes (except the LS treatment) were significantly reduced, the leaf lengths were reduced, and the biomass was significantly reduced. The stomatal size reached the maximum under the LS treatment, and the stomatal density gradually decreased with the increase in drought degree. In terms of electrophysiological responses, drought significantly decreased the net photosynthetic rate (PN) of B. striata, stomatal conductance (gs), and transpiration rate (Tr), but effectively increased the water use efficiency (WUE). The effective thickness of leaves of B. striata increased under drought conditions, and drought promoted the formation of leaf morphological diversity. Our results showed that drought stress changed the physiological and morphological characteristics of B. striata, and under light drought conditions had higher physiological activity, good morphological characteristics, higher cellular metabolic energy and ecological adaptability. Appropriate drought can promote the improvement of the quality of B. striata, and it can be widely planted in mildly arid areas.
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Affiliation(s)
- Yongdao Gao
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Chang Cai
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Qiaoan Yang
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Wenxuan Quan
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Chaochan Li
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
- Correspondence: (C.L.); (Y.W.); Tel.: +86-851-86702710 (C.L.); +86-851-84391746 (Y.W.)
| | - Yanyou Wu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
- Correspondence: (C.L.); (Y.W.); Tel.: +86-851-86702710 (C.L.); +86-851-84391746 (Y.W.)
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Haddoudi L, Hdira S, Hanana M, Romero I, Haddoudi I, Mahjoub A, Ben Jouira H, Djébali N, Ludidi N, Sanchez-Ballesta MT, Abdelly C, Badri M. Evaluation of the Morpho-Physiological, Biochemical and Molecular Responses of Contrasting Medicago truncatula Lines under Water Deficit Stress. PLANTS (BASEL, SWITZERLAND) 2021; 10:2114. [PMID: 34685923 PMCID: PMC8537959 DOI: 10.3390/plants10102114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/29/2021] [Accepted: 09/10/2021] [Indexed: 12/02/2022]
Abstract
Medicago truncatula is a forage crop of choice for farmers, and it is a model species for molecular research. The growth and development and subsequent yields are limited by water availability mainly in arid and semi-arid regions. Our study aims to evaluate the morpho-physiological, biochemical and molecular responses to water deficit stress in four lines (TN6.18, JA17, TN1.11 and A10) of M. truncatula. The results showed that the treatment factor explained the majority of the variation for the measured traits. It appeared that the line A10 was the most sensitive and therefore adversely affected by water deficit stress, which reduced its growth and yield parameters, whereas the tolerant line TN6.18 exhibited the highest root biomass production, a significantly higher increase in its total protein and soluble sugar contents, and lower levels of lipid peroxidation with greater cell membrane integrity. The expression analysis of the DREB1B gene using RT-qPCR revealed a tissue-differential expression in the four lines under osmotic stress, with a higher induction rate in roots of TN6.18 and JA17 than in A10 roots, suggesting a key role for DREB1B in water deficit tolerance in M. truncatula.
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Affiliation(s)
- Loua Haddoudi
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
- Faculty of Mathematical, Physical and Natural Sciences of Tunis, Campus Universitaire El-Manar, University of Tunis El Manar, Tunis 2092, Tunisia
| | - Sabrine Hdira
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
- Faculty of Mathematical, Physical and Natural Sciences of Tunis, Campus Universitaire El-Manar, University of Tunis El Manar, Tunis 2092, Tunisia
| | - Mohsen Hanana
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
| | - Irene Romero
- Laboratory of Biotechnology and Postharvest Quality, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Jose Antonio Novais, 10, 28040 Madrid, Spain; (I.R.); (M.T.S.-B.)
| | - Imen Haddoudi
- Department of Ecosystem Biology, University of South Bohemia, Branisovska 1760, 370 05 Ceske Budejovice, Czech Republic;
| | - Asma Mahjoub
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
| | - Hatem Ben Jouira
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
| | - Naceur Djébali
- Centre of Biotechnology of Borj Cedria, Laboratory of Bioactive Substances, B.P. 901, Hammam-Lif 2050, Tunisia;
| | - Ndiko Ludidi
- Plant Biotechnology Research Group, Department of Biotechnology, University of the Western Cape, Robert Sobukwe Road, Bellville 7530, South Africa;
- DSI-NRF Centre of Excellence in Food Security, University of the Western Cape, Robert Sobukwe Road, Bellville 7530, South Africa
| | - Maria Teresa Sanchez-Ballesta
- Laboratory of Biotechnology and Postharvest Quality, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Jose Antonio Novais, 10, 28040 Madrid, Spain; (I.R.); (M.T.S.-B.)
| | - Chedly Abdelly
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
| | - Mounawer Badri
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, B.P. 901, Hammam-Lif 2050, Tunisia; (L.H.); (S.H.); (M.H.); (A.M.); (H.B.J.); (C.A.)
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