期刊
JOURNAL OF AGRICULTURAL SCIENCE
卷 160, 期 5, 页码 349-359出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0021859622000533
关键词
Argentina; chloroplast; leaf anatomy; light competition; photosynthesis
资金
- Miguel Lillo Foundation [B-0004-1]
- National Institute of Agricultural Technology (INTA)
- Consejo Federal de Ciencia y Tecnologia (COFECYT)
- Ministerio de Ciencia, Tecnologia e Innovacion Productiva (MINCYT) [RESOL-2018-680-APN-MCT]
Field trials in Northwestern Argentina were conducted to study the impact of plant density on Chenopodium quinoa achene yield and its relationship with morphology, leaf anatomy, and gas exchange. High plant density caused light competition, resulting in morphological and anatomical changes in quinoa plants. Despite compensatory strategies, such as increased specific leaf area and chloroplasts per palisade cell, the limitations in carbon absorption and gas exchange led to a lower yield compared to low plant density.
To study the impact of plant density on Chenopodium quinoa (c.v. CICA-17) achene yield and its relationship with morphology, leaf anatomy and gas exchange in the absence of water stress, field trials were conducted at 1995 m asl in Northwestern Argentina. Two plant densities were evaluated; low density (LD) 7.2 plants/m (120 240 pl/ha) and high density (HD) 27.9 plants/m (465 930 pl/ha). HD treatment caused light competition, inducing morphological and anatomical changes in Quinoa plants. Plants grown under HD conditions showed decreases in plant height and stem diameter, lower stomatal dimensions and densities, and thinner leaf blades. Compensation strategies such as increases in specific leaf area and a higher number chloroplasts per palisade cell were observed, nevertheless these changes did not fully compensate C absorption and gas exchange limitations, therefore limiting the uptake of N and P and resulting in a 53.2% lower yield of HD compared to LD. Considering the ability of quinoa plants to change its morphology and anatomy, further studies with intermediate plant densities are necessary in order to determine if it is possible to achieve higher yields and to increase the efficiency in the use of the resources.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据