气候变化领域集成服务门户(CCPortal): Anatomical and Physiological Characteristics of Awn Development in Elymus nutans, an Important Forage Grass in Qinghai-Tibet Plateau

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DOI	10.3390/agronomy13030862
	Anatomical and Physiological Characteristics of Awn Development in Elymus nutans, an Important Forage Grass in Qinghai-Tibet Plateau
	Qiu, Yongsen; Xie, Wengang
发表日期	2023
EISSN	2073-4395
卷号	13 期号:3
英文摘要	Awns are the important structures of inflorescence in many crops that belong to the Poaceae family. In addition, they actively participate in photosynthesis, transpiration, seed dispersal, and self-planting. The Elymus nutans Griseb. is an important, self-pollinated, allohexaploid (2n = 6x = 42) and perennial native forage grass in Qinghai-Tibet Plateau that shows variation in awns length. However, the changes in the anatomical structure, physiological traits, and biochemical characteristics during awn development remain unclear in E. nutans. Therefore, this study investigated the changes in anatomical structures, enzymatic activities, and hormonal regulations of awns at four developmental stages, i.e., booting, heading, flowering, and maturity stages of three E. nutans accessions having different awn lengths. The results showed that the cross-sections of E. nutans awns had an acute triangular shape and structural similarities to wheat awns. In addition, the growth of long awns was recorded faster than short awns at the heading stage, but no significant differences in awns lengths were found at the heading, flowering, and maturity stages. The differences in the sizes of barbs and stomata of three accessions were statistically non-significant; however, the accession with long awns had more stomata than the accession with shorter awns at all developmental stages. In addition, the content of cytokinin (CTK), abscisic acid (ABA), and ethylene (ETH), and activities of superoxide dismutase (SOD) and peroxidase (POD) were significantly related to the development of awn. At the flowering stage, the content of CTK, and activities of SOD and POD of long awn accession were significantly higher than the short awn accession. Therefore, the obtained results provide a sound basis for future research on the molecular mechanisms of awn development and their potential role in E. nutans.
关键词	awns Elymus nutans anatomical structure hormone enzyme awn development
英文关键词	SEED DISPERSAL; GRAIN-YIELD
WOS研究方向	Agronomy ; Plant Sciences
WOS记录号	WOS:000953645600001
来源期刊	AGRONOMY-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283246
作者单位	Ministry of Agriculture & Rural Affairs; Lanzhou University
推荐引用方式 GB/T 7714	Qiu, Yongsen,Xie, Wengang. Anatomical and Physiological Characteristics of Awn Development in Elymus nutans, an Important Forage Grass in Qinghai-Tibet Plateau[J],2023,13(3).
APA	Qiu, Yongsen,&Xie, Wengang.(2023).Anatomical and Physiological Characteristics of Awn Development in Elymus nutans, an Important Forage Grass in Qinghai-Tibet Plateau.AGRONOMY-BASEL,13(3).
MLA	Qiu, Yongsen,et al."Anatomical and Physiological Characteristics of Awn Development in Elymus nutans, an Important Forage Grass in Qinghai-Tibet Plateau".AGRONOMY-BASEL 13.3(2023).