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Difference in sodium spatial distribution in the shoot of two canola cultivars under saline stress.
Plant Cell Physiol. 2012 Jun; 53(6):1083-92.PC

Abstract

Among different mechanisms of salt resistance, regulation of ion distribution among various tissues and intracellular compartmentation are of great importance. In this study, we investigated the effects of salt stress on growth, photosynthesis, and Na(+) accumulation and distribution in leaf apoplast and symplast of two canola (Brassica napus L.) cultivars (NYY 1 and BZY 1). The results showed that the declines in shoot dry mass, leaf water potential and net photosynthetic rate of BZY 1 (salt sensitive) were higher than those of NYY 1 (salt resistant) in response to salt stress. Stomatal limitation to photosynthesis was mainly affected under moderate salinity, whereas the reduction in assimilation rate under severe salt stress was due to both stomatal and non-stomatal limitations. We also found that more Na(+) was distributed to leaf veins in NYY 1 than in BZY 1; simultaneously, less Na(+) accumulated in the leaf blade in NYY 1 than in BZY 1. The percentage of Na(+) in the leaf symplast in NYY 1 was markedly lower than that in BZY 1. Also, Na(+) diffusion in leaves through apoplastic and symplastic pathways of BZY 1 was stronger than that in NYY 1, and the transpiration rate in BZY 1, especially at the leaf edges, decreased more than in NYY 1. Our results showed that NYY 1 accumulated less Na(+) in the shoot, especially in leaf blades, and confined Na(+) to the apoplast to avoid leaf salt toxicity, which could be one reason for the higher resistance of NYY 1 than BZY 1 plants to salt stress.

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Authors+Show Affiliations

Yang Y
College of Natural Resources and Environmental Science, Key Laboratory of Marine Biology, Nanjing Agricultural University, Nanjing 210095, PR China.
Zheng Q
No affiliation info available
Liu M
No affiliation info available
Long X
No affiliation info available
Liu Z
No affiliation info available
Shen Q
No affiliation info available
Guo S
No affiliation info available

MeSH

Biological Transport, ActiveBrassica napusCarbon DioxideIon TransportPhotosynthesisPlant LeavesPlant ShootsPlant StomataPlant TranspirationSalinitySalt-Tolerant PlantsSodiumSodium ChlorideSpecies SpecificityStress, Physiological

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22514091

Citation

Yang, Ying, et al. "Difference in Sodium Spatial Distribution in the Shoot of Two Canola Cultivars Under Saline Stress." Plant & Cell Physiology, vol. 53, no. 6, 2012, pp. 1083-92.
Yang Y, Zheng Q, Liu M, et al. Difference in sodium spatial distribution in the shoot of two canola cultivars under saline stress. Plant Cell Physiol. 2012;53(6):1083-92.
Yang, Y., Zheng, Q., Liu, M., Long, X., Liu, Z., Shen, Q., & Guo, S. (2012). Difference in sodium spatial distribution in the shoot of two canola cultivars under saline stress. Plant & Cell Physiology, 53(6), 1083-92. https://doi.org/10.1093/pcp/pcs055
Yang Y, et al. Difference in Sodium Spatial Distribution in the Shoot of Two Canola Cultivars Under Saline Stress. Plant Cell Physiol. 2012;53(6):1083-92. PubMed PMID: 22514091.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Difference in sodium spatial distribution in the shoot of two canola cultivars under saline stress. AU - Yang,Ying, AU - Zheng,Qingsong, AU - Liu,Mei, AU - Long,Xiaohua, AU - Liu,Zhaopu, AU - Shen,Qirong, AU - Guo,Shiwei, Y1 - 2012/04/17/ PY - 2012/4/20/entrez PY - 2012/4/20/pubmed PY - 2012/9/27/medline SP - 1083 EP - 92 JF - Plant & cell physiology JO - Plant Cell Physiol VL - 53 IS - 6 N2 - Among different mechanisms of salt resistance, regulation of ion distribution among various tissues and intracellular compartmentation are of great importance. In this study, we investigated the effects of salt stress on growth, photosynthesis, and Na(+) accumulation and distribution in leaf apoplast and symplast of two canola (Brassica napus L.) cultivars (NYY 1 and BZY 1). The results showed that the declines in shoot dry mass, leaf water potential and net photosynthetic rate of BZY 1 (salt sensitive) were higher than those of NYY 1 (salt resistant) in response to salt stress. Stomatal limitation to photosynthesis was mainly affected under moderate salinity, whereas the reduction in assimilation rate under severe salt stress was due to both stomatal and non-stomatal limitations. We also found that more Na(+) was distributed to leaf veins in NYY 1 than in BZY 1; simultaneously, less Na(+) accumulated in the leaf blade in NYY 1 than in BZY 1. The percentage of Na(+) in the leaf symplast in NYY 1 was markedly lower than that in BZY 1. Also, Na(+) diffusion in leaves through apoplastic and symplastic pathways of BZY 1 was stronger than that in NYY 1, and the transpiration rate in BZY 1, especially at the leaf edges, decreased more than in NYY 1. Our results showed that NYY 1 accumulated less Na(+) in the shoot, especially in leaf blades, and confined Na(+) to the apoplast to avoid leaf salt toxicity, which could be one reason for the higher resistance of NYY 1 than BZY 1 plants to salt stress. SN - 1471-9053 UR - https://www.unboundmedicine.com/medline/citation/22514091/Difference_in_sodium_spatial_distribution_in_the_shoot_of_two_canola_cultivars_under_saline_stress_ L2 - https://academic.oup.com/pcp/article-lookup/doi/10.1093/pcp/pcs055 DB - PRIME DP - Unbound Medicine ER -