SEED PRIMING INFLUENCE ON GERMINATION AND EMERGENCE OF PEPPER SEED LOTS
SEED PRIMING INFLUENCE ON GERMINATION AND EMERGENCE OF PEPPER SEED LOTS
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DOI：
10.2135/cropsci1990.0011183x003000030049x
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发表时间：
1990-05-01
期刊：
影响因子：
2.3
通讯作者：
TRAWATHA, SE
中科院分区：
文献类型：
--
作者：
BRADFORD, KJ;STEINER, JJ;TRAWATHA, SE
种子引发能显著提高辣椒(Capsicum annuum L.)的发芽率。种子，但并不总是伴随着田间出苗率或百分比的提高。此外，最佳的引种条件可能因品种而异，甚至因特定物种的种子批次而异。本研究的目的是评估一种标准的种子引发程序对大量辣椒种子的室内萌发和田间出苗的影响。将42个(1986年研究)或30个(1987年研究)的‘Yolo Wonder’和‘’Anaheim‘辣椒(全部80%生活力)种子批在25度下浸种7d。用30g KNO3 kg-1H2O溶液浸泡在吸纸上，漂洗，晾干。对照(未处理)和引发剂种子在20度的实验室中萌发。C或在两个地点(美国加利福尼亚州戴维斯和弗雷斯诺)进行田间出苗试验。引发略微降低了实验室最终发芽率，但也使平均萌发时间(MTG)减少了71%至78%。田间出苗率一般不受引种影响，但平均出苗时间(MTE)减少8%至29%。种子批与引发反应之间存在很强的交互作用，其中缓慢萌发的种子批表现出最大的引发效益。在实验室和田间，引发引起的萌发或出苗时间的缩短与最初的MTG或MTE呈线性相关。对照种子的MTG和MTE之间的二次关系通过相同的数据外推到引发种子。因此，虽然实验室发芽率对这些相对高质量的种子批次的田间出苗率预测相对较差，但在三个田间试验中，有两个实验室MTG与田间MTE高度相关。尽管种子批次对标准引发处理的反应程度不同，但所有批次的种子在引发后的萌发率和出苗率都显著提高。
Seed priming can markedly increase the germination rate of pepper (Capsicum annuum L.) seed, but has not always been accompanied by improvements in field emergence rates or percentages. Furthermore, optimal priming conditions may vary among cultivars and even seed lots of a given species. The objective of this study was to evaluate the influence of a standard seed priming procedure on the laboratory germination and field emergence of a large number of pepper seed lots. Forty-two (1986 study) or 30 (1987 study) seed lots of ''Yolo Wonder'' and ''Anaheim'' pepper (all > 80% viability) were primed for 7 d at 25.degree. C on blotters saturated with 30 g KNO3 kg-1 H2O solution, rinsed, and dried. Control (untreated) and primed seeds were then germinated in the laboratory at 20.degree. C or planted in field emergence trials at two locations (Davis and Fresno, CA[USA]) in 2 yr. Priming slightly reduced final laboratory germination percentages, but also decreased the mean times to germination (MTG) by 71 to 78%. Field emergence percentages generally were unaffected by priming, but mean times to emergence (MTE) were reduced by 8 to 29%. There was a strong interaction between seed lots and priming response, with the slowly germinating lots exhibiting the greatest benefit from priming. In both the laboratory and field, the reduction in time to germination or emergence due to priming was linearly related to the initial MTG or MTE. A quadratic relationship between the MTG and MTE of control seeds extrapolated through the same data for primed seeds. Thus, while laboratory germination percentages were a relatively poor predictor of field emergence percentages for these relatively high-quality seed lots, laboratory MTG was highly correlated with field MTE in two of three field trials. Although seed lots differed in the magnitude of their response to a standard priming traetment, all lots exhibited markedly improved rates of germination and emergence after priming.