Home About Browse Search
Svenska


Seed characterization and early nitrogen metabolism performance of seedlings from Altiplano and coastal ecotypes of Quinoa

Pinto-Irish, Katherine and Coba de la Pena, Teodoro and Ostria-Gallardo, Enrique and Ibanez, Cristian and Briones, Vilbett and Vergara, Alexander and Alvarez, Rodrigo and Castro, Catalina and Sanhueza, Carolina and Castro, Patricio A. and Bascunan-Godoy, Luisa (2020). Seed characterization and early nitrogen metabolism performance of seedlings from Altiplano and coastal ecotypes of Quinoa. BMC Plant Biology. 20 , 343 , 1-17
[Journal article]

[img] PDF
3MB

Abstract

Background Early seed germination and a functional root system development during establishment are crucial attributes contributing to nutrient competence under marginal nutrient soil conditions. Chenopodium quinoa Willd (Chenopodiaceae) is a rustic crop, able to grow in marginal areas. Altiplano and Coastal/Lowlands are two representative zones of quinoa cultivation in South America with contrasting soil fertility and edaphoclimatic conditions. In the present work, we hypothesize that the ecotypes of Quinoa from Altiplano (landrace Socaire) and from Coastal/Lowland (landrace Faro) have developed differential adaptive responses in order to survive under conditions of low availability of N in their respective climatic zones of Altiplano and Lowlands. In order to understand intrinsic differences for N competence between landraces, seed metabolite profile and germinative capacity were studied. Additionally, in order to elucidate the mechanisms of N uptake and assimilation at limiting N conditions during establishment, germinated seeds of both landraces were grown at either sufficient nitrate (HN) or low nitrate (LN) supply. We studied the photosynthetic performance, protein storage, root morphometrical parameters, activity and expression of N-assimilating enzymes, and the expression of nitrate transporters of roots in plants submitted to the different treatments.
Results Seeds from Socaire landrace presented higher content of free N-related metabolites and faster seed germination rate compared to Faro landrace. Seedlings of both ecotypes presented similar physiological performance at HN supply, but at LN supply their differences were exalted. At LN, Socaire plants showed an increased root biomass (including a higher number and total length of lateral roots), a differential regulation of a nitrate transporter (aNPF6.3-like homologue) belonging to the Low Affinity Transport System (LATS), and an upregulation of a nitrate transporter (aNRT2.1-like homologue) belonging to the High Affinity nitrate Transport System (HATS) compared to Faro. These responses as a whole could be linked to a higher amount of stored proteins in leaves, associated to an enhanced photochemical performance in Altiplano plants, in comparison to Lowland quinoa plants.
Conclusions These differential characteristics of Socaire over Faro plants could involve an adaptation to enhanced nitrate uptake under the brutal unfavorable climate conditions of Altiplano.

Authors/Creators:Pinto-Irish, Katherine and Coba de la Pena, Teodoro and Ostria-Gallardo, Enrique and Ibanez, Cristian and Briones, Vilbett and Vergara, Alexander and Alvarez, Rodrigo and Castro, Catalina and Sanhueza, Carolina and Castro, Patricio A. and Bascunan-Godoy, Luisa
Title:Seed characterization and early nitrogen metabolism performance of seedlings from Altiplano and coastal ecotypes of Quinoa
Year of publishing :2020
Volume:20
Article number:343
Number of Pages:17
Publisher:BMC
ISSN:1471-2229
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Nitrogen metabolism, N transport, Glutamine synthetase, Photochemical process, Chlorophyll fluorescence, Nitrate reductase, Nitrate transporters, Nitrate-sensing, Proteins, Crop yield
URN:NBN:urn:nbn:se:slu:epsilon-p-107188
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107188
Additional ID:
Type of IDID
DOI10.1186/s12870-020-02542-w
Web of Science (WoS)000553491900001
ID Code:17438
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:14 Sep 2020 08:52
Metadata Last Modified:14 Sep 2020 08:52

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits