Nitrogen and carbon contents, nitrogen use efficiency, and antioxidant responses of perennial ryegrass accessions to nitrogen deficiency. (21st October 2019)

• Record Type: Journal Article
• Authors: Yao, Yanyu; Zhang, Cankui; Camberato, James J.; Jiang, Yiwei
• Is Part Of: Journal of plant nutrition. Volume 42:Number 17(2019)
• Page Start: 2092
• Page End: 2101
• Publication Date: 2019-10-21
• Subjects: atioxidant enzyme -- chlorophyll -- growth -- nitrogen and carbon -- nitrogen use efficiency -- perennial ryegrass; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2019.1655047
• Languages: English
• ISSNs: 0190-4167

Abstract

Abstract: The study was designed to investigate nitrogen and carbon contents, nitrogen use efficiency, and antioxidants of a tolerant accession PI231578 (TOL) and a susceptible PI306292 (SUS) of perennial ryegrass subjected to 7.5 mM N (control) and 0.75 mM N (low) for 6, 12, and 20 d in a growth chamber. The SUS had decreased plant height, dry matter, shoot carbon content and showed more reductions in leaf chlorophyll and shoot N content at 6, 12 d or 20 d of low N. An increased N use efficiency was greater in the shoots of SUS during the low N treatments and in the roots of TOL at 20 d. Shoot soluble protein content (TSP) was unaffected in TOL but decreased in SUS at 20 d of low N, whereas shoot catalase activity decreased in SUS. Root superoxide dismutase and peroxidase activities increased in TOL at 20 d of low N.