![]() ![]() Soil salinization and alkalization frequently occur at the same time in nature ( Zhang et al., 2018). K +, Na +, Ca 2+, Mg 2+, Cl –, HCO 3 –, CO 3 2–, and SO 4 2– are the main ions in natural soil. Soil salinization is one of the major environment problems that limit agricultural production worldwide and cause environmental hazards ( Shabala et al., 2015). These results indicate the presence of different mechanisms responsible for sugar beet responses to neutral salt and alkaline salt stresses. Meanwhile, compared with high alkaline salt, high neutral salt induced the expression change of genes involved in DNA replication, and decreased the expression of genes participating in cutin, suberine and wax biosynthesis, and linoleic acid metabolism. Genes enriched in monoterpenoid biosynthesis, amino acids metabolism and starch and sucrose metabolism were specifically regulated to respond to the high alkaline salt. Kyoto encyclopedia of genes and genomes (KEGG) analysis showed that genes involving cutin, suberine and wax biosynthesis, sesquiterpenoid and triterpenoid biosynthesis and flavonoid biosynthesis had simultaneously changed expression under low neutral salt or alkaline salt, so these genes may be related to stimulating sugar beet growth in both low salt treatments. Overall, 4,773 and 2,251 differentially expressed genes (DEGs) were identified in leaves and roots, respectively. We used next-generation RNA-Seq technique to analyze transcriptional changes under neutral salt and alkaline salt treatment in sugar beet. Furthermore, sugar beet tends to synthesize higher levels of soluble sugar and reducing sugar to cope with high neutral salt stress, and more drastic changes in indole acetic acid (IAA) and abscisic acid (ABA) contents were detected. But a high level of neutral salt (NaCl: Na 2SO 4 1:1, Na + 100 mM) significantly inhibited plant growth and photosynthesis. Under a high concentration of alkaline salt (Na 2CO 3, Na + 100 mM), the growth of plants was not significantly affected compared with the control. We found that a low level of neutral salt (NaCl:Na 2SO 4 1:1, Na + 25 mM) or alkaline salt (Na 2CO 3, Na + 25 mM) significantly enhanced total biomass, leaf area and photosynthesis indictors in sugar beet. The aim of this study was to investigate the influence of neutral salt (NaCl:Na 2SO 4, 1:1) and alkaline salt (Na 2CO 3) treatment on physiological and transcriptome changes in sugar beet. vulgaris L.) is a moderately salt tolerant glycophyte, but little is known about the different mechanisms of sugar beet response to salt and alkaline stresses. The salinization and alkalization of soil are widespread environmental problems. 4DAFNAE, Dipartimento di Agronomia, Animali, Alimenti, Risorse Naturali e Ambiente, Università degli Studi di Padova, Legnaro, Padua, Italy.3College of Life Sciences, Heilongjiang University, Harbin, China.2Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, China.1Heilongjiang Sugar Beet Center of Technology Innovation, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, China.Gui Geng 1,2, Renren Li 3, Piergiorgio Stevanato 4, Chunhua Lv 3, Zhengyu Lu 1,2, Lihua Yu 1,2 and Yuguang Wang 1,2* ![]()
0 Comments
Leave a Reply. |