干旱区生态环境知识资源中心(Arid): Mechanisms of nitrogen conservation at the leaf-level in annual and perennial desert forbs: Implications for perennial crops domestication

Arid

DOI	10.1016/j.flora.2019.02.008
	Mechanisms of nitrogen conservation at the leaf-level in annual and perennial desert forbs: Implications for perennial crops domestication
	Gonzalez-Paleo, L.1,2; Pastor-Pastor, A.1; Rajnoch, G.2; Ravetta, D. A.1,2
通讯作者	Gonzalez-Paleo, L.
来源期刊	FLORA
ISSN	0367-2530
EISSN	1618-0585
出版年	2019
卷号	252 页码:62-68
英文摘要	Perennial plants show traits such as long-lived leaves and higher nutrient retention that provide a more efficient use of nutrients in low-resource environments when compared to annuals. These traits do not only generate yield stability but should be relevant in the provision of regulating ecosystem services for sustainability. The understanding of the mechanisms underlying nutrient use and conservation in perennial herbaceous crops might provide useful evidence to test the potential benefits of perennial crops in low-resource environments. Using annual and perennial Physaria as a working model, we tested the link between nitrogen use efficiency (NUE), plant's life-cycle, and specific leaf area (SLA), as an indicator of C economy strategy. As expected, SLA was pivotal in determining differences in N use and conservation, except for two processes: resorption efficiency and proficiency. The maintenance of green leaf tissues through long-lived leaves in perennials may play a key role in the capacity to store carbon and nitrogen during the grain-filling phase. Perennials had 50% less leaf senescence, lost 50% less nitrogen, had higher mean residence time, and a higher nitrogen use efficiency than annuals. Photosynthetic N use efficiency and N productivity were dependent on environmental conditions: perennials which maintained a conservative strategy both years also showed a more stable biomass production. Traits relevant for the ability to minimize nitrogen losses and internal plant nitrogen turnover over multiple seasons shown by perennials may be relevant in improving both resource use efficiency and yield stability.
英文关键词	New crops Physaria Leaf life-span Specific leaf area Nitrogen retention Nitrogen resorption
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000459917800008
WOS关键词	USE EFFICIENCY ; NUTRIENT RESORPTION ; LIFE-SPAN ; WATER-USE ; YIELD ; WILD ; PRODUCTIVITY ; TRADEOFFS ; SELECTION ; STRATEGY
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215641
作者单位	1.Consejo Nacl Invest Cient & Tecn, Museo Egidio Feruglio, Av Fontana 140, RA-9100 Trelew, Argentina; 2.Univ Nacl Patagonia San Juan Bosco, Chubut, Argentina
推荐引用方式 GB/T 7714	Gonzalez-Paleo, L.,Pastor-Pastor, A.,Rajnoch, G.,et al. Mechanisms of nitrogen conservation at the leaf-level in annual and perennial desert forbs: Implications for perennial crops domestication[J],2019,252:62-68.
APA	Gonzalez-Paleo, L.,Pastor-Pastor, A.,Rajnoch, G.,&Ravetta, D. A..(2019).Mechanisms of nitrogen conservation at the leaf-level in annual and perennial desert forbs: Implications for perennial crops domestication.FLORA,252,62-68.
MLA	Gonzalez-Paleo, L.,et al."Mechanisms of nitrogen conservation at the leaf-level in annual and perennial desert forbs: Implications for perennial crops domestication".FLORA 252(2019):62-68.