Utilisation of stored lipids during germination in dimorphic seeds of euhalophyte Suaeda salsa

被引:20
|
作者
Zhao, Yuanqin [1 ]
Ma, Yanchun [1 ]
Li, Qiang [1 ]
Yang, Yang [1 ]
Guo, Jianrong [1 ]
Song, Jie [1 ]
机构
[1] Shandong Normal Univ, Coll Life Sci, Shandong Prov Key Lab Plant Stress, Jinan 250014, Shandong, Peoples R China
关键词
dimorphic seeds; germination; glyoxylate cycle; lipase; lipids; Suaeda salsa; STORAGE OIL MOBILIZATION; GLYOXYLATE CYCLE; SEEDLING GROWTH; ECOLOGICAL SIGNIFICANCE; SALINITY TOLERANCE; MALATE SYNTHASE; CASTOR BEANS; NITRIC-OXIDE; LIPASE; ARABIDOPSIS;
D O I
10.1071/FP17309
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Utilisation of stored lipids plays an important role in germination of oil seeds. In the present study, key enzyme activity (lipase, isocitrate lyase and malate synthase) in lipid utilisation was determined during germination in dimorphic seeds of euhalophyte Suaeda salsa (L.) Pall. The results revealed that the percentage of germination were highest in intertidal brown seeds, followed by inland brown seeds and then inland black seeds moistened with 0 and 300 mM NaCl during early seed germination. The same trend was found in the activity of three enzymes and soluble sugar content when seeds were moistened with 0 and 300 mM NaCl for 3 h. Salinity reduced the activity of three enzymes in inland brown and black seeds in the initial 3 h, except that salinity had no adverse effect on isocitrate lyase activity of brown seeds. Salinity had no adverse effect on three enzymes in inland brown and black seeds in the initial 30 h, except that it decreased malate synthase activity of black seeds. Salinity had no effect on three enzymes in intertidal brown seeds in the initial 3 h and 30 h. In conclusion, high activity of these enzymes in brown seeds may play an important role in utilisation of stored lipids during their rapid seed germination.
引用
收藏
页码:1009 / 1016
页数:8
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