模拟盐和干旱胁迫对4种虉草杂交后代种子萌发的影响

Effect of salt and drought on seed germination ofPhalaris arundinacea L.hybridSiriguleng

摘要:

以YC10902、YC11101、YC11002、YC108 4个品系为材料,分别利用100 mmol/L NaCl模拟盐分胁迫、10% PEG-600 模拟干旱胁迫和交互处理后对相对发芽率、相对发芽指数、相对活力指数、根长和芽长等指标进行隶属度综合评价。结果表明:盐胁迫不仅发生在虉草(Phalaris arundinacea)种子萌发早期,苗后生长期也受到显著影响;干旱胁迫主要发生在苗后生长期;交互胁迫的影响最显著,发生在苗后生长期,尤以对胚芽的生长限制为主。在单一盐胁迫和干旱胁迫下YC108表现最好;在交互处理下,YC11101品系表现最好,YC108仅次于YC11101。试验表明YC108和YC11101品系在科尔沁地区具有良好的种植潜力。

Abstract:

For breeding new varieties suitable for planting in Horqin area,we analyzed the salt and drought stress affection on four varieties (YC10902,YC11101,YC11002 and YC108) of Phalaris arundinacea L.seed germination and late period.Relative germination rate,relative germination index,relative vigor index and plumule and radicle length were comprehensively evaluated by using 100 mmol/L NaCl to simulate salt stress,10% PEG-600 to simulate drought stress and interactive treatment.The results showed that salt stress not only occurred in seed early germination but also in late seedling period;The drought stress mainly occurred in the late seedling growth.The most significant effect of interaction stress was occurred in the late seedling period,especially in limited the growth of the radicle.Under single treatment of drought and salt,YC108 got the optimal performance,while,under drought and salt interactive treatment YC11101 got the optimal performance followed by the YC108.Therefore,YC108 and YC11101 strains are considered to have good planting potential in Horqin region.