摘要
为了评价不同藜麦种质资源的耐盐性差异,以123份藜麦种质资源为材料,设置4个盐浓度(100、150、250和350m M)进行苗期盐胁迫处理试验,并鉴定其盐胁迫表型。结果表明,分别有3、20和94份种质能够耐受350、250和150 m M浓度的盐胁迫,所有藜麦种质对100 m M盐处理均不敏感。之后选取可耐受350m M盐浓度的3份种质PI 614921、Ames 13726、Ames 13761和另外3个可耐受250 m M盐浓度的现代藜麦品种Pasto、Atlas和Riobamba进行全生育周期盐胁迫处理试验,盐浓度为100、150和250m M,检测盐处理后4周和收获期藜麦的株高、叶绿素含量、根系干重、地上部干重以及最终籽粒产量。结果表明,藜麦植株的各生理指标和盐处理浓度均呈显著负相关;藜麦根系干重受盐胁迫影响最大,籽粒产量所受影响最小。最后选取Pasto、Atlas和Riobamba在电导率为7.0 m S·cm-1的盐土耕地上进行株行距密度分别为5 cm×12.5 cm和5 cm×50 cm的小区试验,收获后检测各小区的产量。3个品种的折算产量最高分别可达2.18、2.48和2.26 t·hm-2,其中Atlas和Pasto适于高密度种植、Riobamba适于低密度种植。综上所述,藜麦是一种普遍耐盐的物种,但是不同种质的耐盐性之间存在较大差异;盐胁迫对于藜麦产量的影响较小,因此盐土环境下种植不会使其经济价值大幅度下降。藜麦良好的耐盐性和较高的经济价值对进一步科学合理地利用盐土资源具有重要意义。
In order to evaluate the differences of salt tolerance among different quinoa germplasm resources,using 123 germplasms as material,seedling salt-tolerance experiments were conducted under four salt concentrations of 100,150,250 and 350 m M,to identify the salt stress phenotype. The result indicated that within the tested germplasms,3,20 and94 of them could tolerate 350,250 and 150 m M Na Cl treatment,respectively,but none was sensitive to 100 m M.Later,salt-stress experiments of whole growth cycle were carried out with six germplasms,three（ PI 614921,Ames13726,Ames 13761） of which could tolerate 350 m M,and the other three were modern cultivars（ Pasto,Atlas and Riobamba） that can tolerate 250 m M. The saltconcentrations were 100,150 and 250 m M. The plant height,chlorophyll content,the dry weight of the root and aerial-part in four weeks after salt treatment and harvest period as well as the seed yield were assayed,respectively. The result showed all of the indexes measured negatively correlated with the salt concentration,the salt stress largely influenced the dry weight of the root,but relatively had minor effect on the grainyield. Finally,the modern cultivars Pasto,Atlas and Riobamba were selected for the field trial in saline soil of which the EC value is as high as 7. 0 m S·cm- 1. Two planting densities were set as 5 cm × 12. 5 cm and 5 cm × 50 cm（ the distance between plants × the distance between rows）. The results showed that the highest yield of the three chosen cultivars were 2. 18,2. 48 and 2. 26 t·hm- 2,respectively,of which Atlas and Pasto fitted the high- density culture and Riobamba fitted the low-density. To sum up,this study indicated that quinoa was a salt-tolerance species,its salttolerance level varied largely in different germplasm; the salt stress had relatively minor effect on quinoa yield,and it suggested that saline land culture could restrict the yield of quinoa limitedly,the outstanding salt-tolerance nature and economic value of quinoa will be of great importance in th
出处
《核农学报》
CAS
CSCD
北大核心
2017年第1期145-155,共11页
Journal of Nuclear Agricultural Sciences
基金
江苏省农业科技自主创新资金项目[CX(14)2044]
美国国际发展署Securing Water for Food Award-salt Tolerant Quinoa子项目(UR4443 B)
关键词
藜麦
盐胁迫
产量
沿海滩涂
quinoa
salinity stress
yield
coastal beach
