Effects of phosphate deficiency on assimilate partitioning in barley seedlings
Effects of phosphate deficiency on assimilate partitioning in barley seedlings
复制标题
缺磷对大麦幼苗同化物分配的影响
DOI：
10.1016/0168-9452(88)90136-7
复制
发表时间：
1988
期刊：
影响因子：
5.2
通讯作者：
D. Kremer
中科院分区：
文献类型：
--
作者：
R. Sicher;D. Kremer
研究了大麦（Hordeum vulcanum L.）用含有0或1毫摩尔正磷酸盐（Pi）的矿物质营养液从种子培育的幼苗。碳同化速率和叶片伸长速率受低氮处理抑制约40%。淀粉和蔗糖水平是相似的PI耗尽相比，在大部分的光周期的控制叶片。这些结果表明，低氮处理抑制了初生叶的碳输出。缺磷大麦叶片中酸提取物Pid在暗转光后下降约60%。在与对照大麦和烟草（Nicotiana tabacumL.）叶片酸提物P含量分别降低25%和15%。这些结果提供了初步的证据，叶含量的日变化。低Picomethane处理叶片的光合中间产物水平较低，可提取酶活性与对照相同或高于对照。这些观察结果表明，光合中间池周转更快地在低Pi比Pi充足的叶片。
Photosynthesis and assimilate partitioning were measured in barley (Hordeum vulgareL.) seedlings raised from seed with mineral nutrient solution containing either 0 or 1 mmolar orthophosphate (Pi). Carbon assimilation rates and leaf extension rates were inhibited about 40% by low Pitreatment. Starch and sucrose levels were similar in Pi-depleted compared to control leaves during most of the photoperiod. These results indicated that low Pitreatment inhibited carbon export from the primary leaf. Acid extractable Pidecreased about 60% in Pi-depleted barley leaves after a dark to light transition. In similar experiments with control barley and tobacco (Nicotiana tabacumL.) leaves acid extractable Pidecreased about 25% and 15%, respectively. These findings provided preliminary evidence for a diurnal variation in leaf Picontent. Photosynthetic intermediate levels were lower and extractable enzyme activities were the same or higher in low Picompared to control leaves. These observations suggested that photosynthetic intermediate pools turnover more quickly in low Pithan in Pi-sufficient leaves.