【摘要】 为给燕麦优化栽培技术措施的制定和高β-葡聚糖含量的品种选育提供理论依据,以不同地区的四个燕麦品种为试验材料,对燕麦籽粒β-葡聚糖含量的变化规律进行了研究。结果表明,从开花到籽粒完全成熟,β-葡聚糖含量呈逐渐增长的趋势。其中总β-葡聚糖在花后15 d内迅速合成,是β-葡聚糖合成积累的关键时期,之后合成和积累速度减缓,其中可溶性β-葡聚糖在花后10 d内积累速度较快,而后变缓。不同燕麦品种的β-葡聚糖含量存在显著差异,而且可溶性β-葡聚糖所占比例表现为皮燕麦高于裸燕麦。从燕麦籽粒形成到成熟,不同品种籽粒中葡萄糖含量均呈先上升后下降的趋势,且花后15 d左右达到最大值,葡萄糖含量与β-葡聚糖含量没有显著相关性,葡萄糖含量不是燕麦籽粒中β-葡聚糖合成的限制因素。更多还原

【Abstract】 In this study,four oat(Avena sativa L.) varieties(two hulled and two naked oat),were used to observe the dynamics of β-glucan in oat grains in Experimental Station of Inner Mongolia Agricultural University by sampling every 5 days after anthesis.The results showed that from blossoming to seed mature,total β-glucan concentration in oat grain was increased gradually,and its accumulation rate in first 15 days was faster than that in the second 15 days after anthesis,more than half of β-glucan in matured seed was accumulated in this period,therefore the first 15 days after anthesis could be considered as key period to regulate the β-glucan content in oat seeds by agronomic methods.The accumulation of soluble β-glucan was faster in the 10 days after anthesis,and then slowed down gradually.The β-glucan concentrations in different oat varieties showed much difference.The ratio of soluble β-glucan to total β-glucan content for hulled oats was higher than that for naked oats. Glucose concentration in oat grain increased gradually,and reached the peak at day 15 after anthesis,then decreased gradually.The statistics analysis showed there was no correlation between glucose concentration and β-glucan concentration in oat grains,glucose content could not be the limiting factor for β-glucan synthsis in oat seeds.更多还原