草原与草坪
草原與草坪
초원여초평
GRASSLAND AND TURF
2014年
5期
16-20
,共5页
韩瑞宏%李志丹%高桂娟%王明祖%罗肖玲
韓瑞宏%李誌丹%高桂娟%王明祖%囉肖玲
한서굉%리지단%고계연%왕명조%라초령
盐胁迫%热研 2 号柱花草%种子萌发
鹽脅迫%熱研 2 號柱花草%種子萌髮
염협박%열연 2 호주화초%충자맹발
salt stress%Stylosanthes guianensis cv.Reyan No.2%seed germination
以热研2号柱花草种子为试验材料,采用0%、0.2%、0.6%、1.0%、1.4%、1.8%共6个浓度的 NaCl 模拟盐胁迫,研究盐胁迫对热研2号柱花草种子发芽及幼苗生长的影响。结果表明：1.8%的NaCl 能显著抑制热研2号柱花草的发芽率,其他浓度 NaCl 对柱花草发芽率影响不显著。不同浓度的NaCl 对柱花草发芽势、发芽指数、活力指数、幼苗鲜重有促进和抑制作用,一定浓度促进,高浓度则起抑制作用。幼苗的根、下胚轴对盐胁迫较为敏感,0.6%的 NaCl 能显著抑制幼苗的根长和下胚轴长。
以熱研2號柱花草種子為試驗材料,採用0%、0.2%、0.6%、1.0%、1.4%、1.8%共6箇濃度的 NaCl 模擬鹽脅迫,研究鹽脅迫對熱研2號柱花草種子髮芽及幼苗生長的影響。結果錶明：1.8%的NaCl 能顯著抑製熱研2號柱花草的髮芽率,其他濃度 NaCl 對柱花草髮芽率影響不顯著。不同濃度的NaCl 對柱花草髮芽勢、髮芽指數、活力指數、幼苗鮮重有促進和抑製作用,一定濃度促進,高濃度則起抑製作用。幼苗的根、下胚軸對鹽脅迫較為敏感,0.6%的 NaCl 能顯著抑製幼苗的根長和下胚軸長。
이열연2호주화초충자위시험재료,채용0%、0.2%、0.6%、1.0%、1.4%、1.8%공6개농도적 NaCl 모의염협박,연구염협박대열연2호주화초충자발아급유묘생장적영향。결과표명：1.8%적NaCl 능현저억제열연2호주화초적발아솔,기타농도 NaCl 대주화초발아솔영향불현저。불동농도적NaCl 대주화초발아세、발아지수、활력지수、유묘선중유촉진화억제작용,일정농도촉진,고농도칙기억제작용。유묘적근、하배축대염협박교위민감,0.6%적 NaCl 능현저억제유묘적근장화하배축장。
Stylosanthes guianensis cv.Reyan No.2 was used to study the impacts of salt stress on seed ger-mination and seedling growth treated with different concentrations of NaCl solution (0%,0.2%,0.6%,1.0%, 1.4% and 1.8%).The results showed that the germination rate decreased significantly under 1.8% NaCl solu-tion stress,no significant influence was found under the rest concentrations.NaCl stress had both promoting and inhibitory impacts on germination potential,germination index,vigor index,seedling fresh weights,there were promoting impact under certain concentration and inhibitory impact under higher concentration.The lengths of roots and hypocotyls were more susceptible to NaCl stress and were significantly inhibited while the concentra-tion reached 0.6%.
