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Effects of KNO_3 pretreatment and temperature on seed germination of Sorbus pohuashanensis 被引量:4
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作者 BIAN Lei YANG Ling +1 位作者 WANG Jian-an SHEN Hai-long 《Journal of Forestry Research》 SCIE CAS CSCD 2013年第2期309-316,共8页
We characterized the effects of KNO3 pretreatment and germination temperature on dormancy breaking and germination of mature mountain ash seeds. Seeds treated with KNO3 and germinated at 25 ℃ followed by 5 ℃ had sig... We characterized the effects of KNO3 pretreatment and germination temperature on dormancy breaking and germination of mature mountain ash seeds. Seeds treated with KNO3 and germinated at 25 ℃ followed by 5 ℃ had significantly higher germination percentages and germination potentials (51% and 49%, respectively), compared with controls. These treated seeds also exhibited reduced germination initiation times (minimum of 48 days), and elevated germination rate indices (up to 97). The germination of seeds subjected to long-term cold storage (2 years at 0-5 ℃) was also significantly improved by 3 days of 4% KNO3 pretreatment before germinating under a variable temperature regimen (5 ℃ followed by 25 ℃, and followed by 5 ℃). Germination percentages and germination potentials for these cold-stored seeds reached 67% and 54%, respectively, and the germination rate index increased to 126.99. Pretreatment of mountain ash seeds with KNO3 represents a practical, effective, and pollution-free method for improving germination, and can be implemented easily within a variety of nursery settings. 展开更多
关键词 Sorbus pohuashanesis seed dormancy seed germination KNO3 pretreatment
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Effect of different seed treatments on dormancy breaking and germination in three species in arid and semi-arid lands 被引量:8
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作者 Seyed Mohammad Hosseini NASR Sekineh Kiani SAVADKOOHI Elahe AHMADI 《Forestry Studies in China》 CAS 2013年第2期130-136,共7页
Seeds of many woody plant species have one of several types of dormancy. They do not germinate unless ,specific environmental signals are in place or events occur. This study was conducted to evaluate the effects of s... Seeds of many woody plant species have one of several types of dormancy. They do not germinate unless ,specific environmental signals are in place or events occur. This study was conducted to evaluate the effects of scarification treatments on seed dormancy and germination of Acacia nilotica (L.) Willd. ex Del., Prosopis juliflora (Sw.) DC. :and Dodonaea viscosa (L.) Jacq. The following treatments were applied: T1, untreated seed (control); T2, sulphuric acid (97%) for 45 min; T3, boiling water for 5 min. The seeds were cultured on a Murashige and Skoog (MS) medium after sterilization. The responses of seeds to treatments were compared with each other and with the control treatment. Germination was observed daily for a 30-day period. Results indicated positive responses to treatments, while impermeable Seed coats may be responsible for low germination rates in intact seeds as seen experimentally in the untreated control. The highest germination was obtained for P. juliflora and D. viscosa acid-scarified seeds (80.8%-90.8%) and for scarified seeds of A. nilotica (50.2%) boiled in water. The germination indices, i.e., final germination percentage (FG), mean daily germination (MDG) and germination rate (GR), were significantly affected by treatments and species (p 〈 0.01). 展开更多
关键词 germination medium pretreatment seed dormancy
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不同种子预处理对10种沙拐枣植物萌发的影响(英文) 被引量:15
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作者 陶玲 任珺 《西北植物学报》 CAS CSCD 2004年第4期601-609,共9页
为了确定沙拐枣植物种子的萌发特性及最优播前预处理方法,在实验室条件下,对10种沙拐枣植物的种子进行了磨砺、硫酸和热水浸泡、冷藏、种子浸出液处理,然后进行发芽实验研究.萌发实验的结果表明,10种沙拐枣植物对于不同的种子预处理,均... 为了确定沙拐枣植物种子的萌发特性及最优播前预处理方法,在实验室条件下,对10种沙拐枣植物的种子进行了磨砺、硫酸和热水浸泡、冷藏、种子浸出液处理,然后进行发芽实验研究.萌发实验的结果表明,10种沙拐枣植物对于不同的种子预处理,均表现出相似的萌发反应.磨砺、硫酸浸泡和冷藏处理对种子萌发有明显地促进作用.与对照相比,种子浸出液处理对种子的发芽率、发芽速度均具有明显地抑制作用,并能增强种子的休眠.冷藏处理具有打破有活力的种子休眠、促进种子萌发的作用,但它与热水浸泡处理一样,对有活力种子表现出一定的致死作用.沙拐枣植物的萌发模式在不同种子预处理间均表现出明显的差异性.机械磨擦和硫酸处理能够促进种子的萌发率及发芽势.泡果沙拐枣 Calligonumjunceum 在本项实验中表现出很强的萌发能力. 展开更多
关键词 沙拐枣 种子预处理 种子萌发 种子休眠
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