Investigation of Salt Tolerance Mechanisms Across a Root Developmental Gradient in Almond Rootstocks.

Autor:	Shao Y; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.; Key Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China., Cheng Y; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China., Pang H; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.; College of Horticulture, Hebei Agricultural University, Baoding, China., Chang M; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., He F; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.; College of Forestry, Sichuan Agricultural University, Chengdu, China., Wang M; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., Davis DJ; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., Zhang S; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., Betz O; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., Fleck C; Sierra Gold Nurseries, Yuba City, CA, United States., Dai T; Key Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China., Madahhosseini S; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.; Genetic and Plant Production Department, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran., Wilkop T; Light Microscopy Core, University of Kentucky, Lexington, KY, United States., Jernstedt J; Department of Plant Sciences, University of California, Davis, Davis, CA, United States., Drakakaki G; Department of Plant Sciences, University of California, Davis, Davis, CA, United States.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2021 Jan 05; Vol. 11, pp. 595055. Date of Electronic Publication: 2021 Jan 05 (Print Publication: 2020).
DOI:	10.3389/fpls.2020.595055
Abstrakt:	The intensive use of groundwater in agriculture under the current climate conditions leads to acceleration of soil salinization. Given that almond is a salt-sensitive crop, selection of salt-tolerant rootstocks can help maintain productivity under salinity stress. Selection for tolerant rootstocks at an early growth stage can reduce the investment of time and resources. However, salinity-sensitive markers and salinity tolerance mechanisms of almond species to assist this selection process are largely unknown. We established a microscopy-based approach to investigate mechanisms of stress tolerance in and identified cellular, root anatomical, and molecular traits associated with rootstocks exhibiting salt tolerance. We characterized three almond rootstocks: Empyrean-1 (E1), Controller-5 (C5), and Krymsk-86 (K86). Based on cellular and molecular evidence, our results show that E1 has a higher capacity for salt exclusion by a combination of upregulating ion transporter expression and enhanced deposition of suberin and lignin in the root apoplastic barriers, exodermis, and endodermis, in response to salt stress. Expression analyses revealed differential regulation of cation transporters, stress signaling, and biopolymer synthesis genes in the different rootstocks. This foundational study reveals the mechanisms of salinity tolerance in almond rootstocks from cellular and structural perspectives across a root developmental gradient and provides insights for future screens targeting stress response. Competing Interests: The reviewer JS declared a shared affiliation, with no collaboration, with one of the authors TD to the handling editor at the time of the review. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2021 Shao, Cheng, Pang, Chang, He, Wang, Davis, Zhang, Betz, Fleck, Dai, Madahhosseini, Wilkop, Jernstedt and Drakakaki.)
Databáze:	MEDLINE
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