Document is current

Article History

Received: 27 August 2018

Accepted: 29 November 2018

First Online: 9 January 2019

Ethics approval and consent to participate

: All the available materials used in our study were grown in the field of State Key Laboratory of Crops Stress Biology for Arid Areas (Northwest A&F University, Yangling, China). Samples collection complied with the institutional, national and international guidelines. This article did not contain any studies with human participants or animals performed by any of authors. No specific permits were required.

: Not applicable.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.