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Yang P, Li Z, Wu C, Luo Y, Li J, Wang P, Gao X, Gao J, Feng B. Identification of Differentially Expressed Genes Involved in the Molecular Mechanism of Pericarp Elongation and Differences in Sucrose and Starch Accumulation between Vegetable and Grain Pea ( Pisum sativum L.). Int J Mol Sci 2019; 20:E6135. [PMID: 31817460 PMCID: PMC6941006 DOI: 10.3390/ijms20246135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/03/2019] [Accepted: 12/03/2019] [Indexed: 11/16/2022] Open
Abstract
Pea (Pisum sativum L.), as a major source of plant protein, is becoming one of the major cultivated crop species worldwide. In pea, the pericarp is an important determinant of the morphological characteristics and seed yield. To investigate the molecular mechanism of pericarp elongation as well as sucrose and starch accumulation in the pods of different pea cultivars, we performed transcriptomic analysis of the pericarp of two types of pea cultivar (vegetable pea and grain pea) using RNA-seq. A total of 239.44 Gb of clean sequence data were generated, and were aligned to the reference genome of Pisum sativum L. In the two samples, 1935 differentially expressed genes (DEGs) were identified. Among these DEGs, three antioxidant enzyme superoxide dismutase (SOD) were detected to have higher expression levels in the grain pea pericarps at the pod-elongating stages. Otherwise, five peroxidase (POD)-encoding genes were detected to have lower expression levels in the vegetative pericarps at the development stage of pea pod growth. Furthermore, genes related to starch and sucrose metabolism in the pea pod, such as SUS, INV, FBA, TPI, ADPase, SBE, SSS, and GBSS, were found to be differentially expressed. The RNA-seq data were validated through real-time quantitative RT-PCR of 13 randomly selected genes. Our findings provide the gene expression profile of, as well as differential expression information on, the two pea cultivars, which will lay the foundation for further studies on pod development and nutrition accumulation in the pea and provide valuable information for pea cultivar improvement.
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Affiliation(s)
- Pu Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Zhonghao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Caoyang Wu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Yan Luo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Jing Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Pengke Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Xiaoli Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Jinfeng Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
| | - Baili Feng
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, China; (P.Y.); (Z.L.); (C.W.); (Y.L.); (J.L.); (P.W.); (X.G.); (J.G.)
- Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture, Yangling 712100, China
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Zhang Y, Gao X, Li J, Gong X, Yang P, Gao J, Wang P, Feng B. Comparative analysis of proso millet (Panicum miliaceum L.) leaf transcriptomes for insight into drought tolerance mechanisms. BMC Plant Biol 2019; 19:397. [PMID: 31510928 PMCID: PMC6737659 DOI: 10.1186/s12870-019-2001-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 08/30/2019] [Indexed: 05/03/2023]
Abstract
BACKGROUND Drought stress is a major abiotic stress that causes huge losses in agricultural production. Proso millet (Panicum miliaceum L.) can efficiently adapt to drought stress and provides important information and gene resources to improve drought tolerance. However, its complex drought-responsive mechanisms remain unclear. RESULTS Among 37 core Chinese proso millet cultivars, Jinshu 6 (JS6) was selected as the drought-sensitive test material, whereas Neimi 5 (NM5) was selected as the drought-tolerant test material under PEG-induced water stress. After sequencing, 1695 differentially expressed genes (DEGs) were observed in JS6 and NM5 without PEG-induced water stress (JS6CK and NM5CK). A total of 833 and 2166 DEGs were found in the two cultivars under simulated drought by using 20% PEG-6000 for 6 (JS6T6 and NM5T6) and 24 h (JS6T24 and NM5T24), respectively. The DEGs in JS6T6 and JS6T24 treatments were approximately 0.298- and 0.754-fold higher than those in NM5T6 and NM5T24, respectively. Compared with the respective controls, more DEGs were found in T6 treatments than in T24 treatments. A delay in the transcriptional responses of the ROS scavenging system to simulated drought treatment and relatively easy recovery of the expression of photosynthesis-associated genes were observed in NM5. Compared with JS6, different regulation strategies were observed in the jasmonic acid (JA) signal transduction pathway of NM5. CONCLUSION Under PEG-induced water stress, NM5 maintained highly stable gene expression levels. Compared with drought-sensitive cultivars, the different regulation strategies in the JA signal transduction pathway in drought-tolerant cultivars may be one of the driving forces underlying drought stress tolerance.
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Affiliation(s)
- Yuyu Zhang
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Xiaoli Gao
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Jing Li
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Xiangwei Gong
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Pu Yang
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Jinfeng Gao
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Pengke Wang
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
| | - Baili Feng
- College of Agronomy, Northwest A&F University / State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100 Shaanxi China
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