摘要
灌浆期两个不同穗型冬小麦品种 :大穗型品种豫麦 6 6和多穗型品种豫麦 4 9旗叶光合速率、蔗糖含量、蔗糖磷酸合成酶 (SPS)活性变化均呈单峰曲线 ,但豫麦 6 6的峰值出现偏晚 ,而且灌浆中后期下降缓慢 ,显示出源端较强的同化物持续供应能力。籽粒中蔗糖含量和蔗糖合成酶 (SS)活性呈单峰曲线 ,豫麦 6 6的峰值出现偏晚 ,且高值持续期长 ;腺苷二磷酸葡萄糖焦磷酸化酶 (AGPP)活性呈单峰曲线 ,均在花后 2 0d达到峰值 ;豫麦 6 6淀粉积累高峰出现较晚 ,但在灌浆中后期淀粉积累量和积累速率均明显高于豫麦 4 9,显示灌浆后期豫麦 6 6仍具有较强的库活性。
Large-spike type cultivar Yumai 66 and small-spike type cultivars Yumai 49 were used to study the relationship between their source-sink intensity and starch accumulation during grain filling stage. Changes in photosynthetic rate,sucrose content and sucrose phosphate synthase(SPS)activity in flag leaf of two cultivars showed a single-peak curve, but Yumai 66 reached the peak a little later than that of Yumai 49, and then declined slowly during later filling stage. It showed that the“Source”of Yumai 66 had stronger supplying ability of assimilator,compared with Yumai 49. The changes of sucrose content and sucrose synthase(SS) activity in kernels of both cultivars came to be a single-peak curve, but for Yumai 66 reached the peak 5 days later than that for Yumai 49. ADP-glucose pyrophosphorylase(AGPP)activity in kernel also showed a single-peak curve, the peak appeared at 20 days after anthesis. The peak of starch accumulation of Yumai 66 appeared later than that of Yumai 49,but starch accumulation and starch accumulation rate of Yumai 66 were higher than that of Yumai 49 during middle and latter filling stage,indicating that“Sink”intensity of Yumai 66 was stronger than Yumai 49 in the latter filling stage.
出处
《作物学报》
CAS
CSCD
北大核心
2004年第9期916-921,共6页
Acta Agronomica Sinica
基金
河南省教育厅资助项目
关键词
冬小麦
穗型
源库强度
淀粉
酶
Winter wheat
Spike type
Source-sink intensity
Starch
Enzyme
