Effects of leaf zeatin and zeatin riboside induced by different clipping heights on the regrowth capacity of ryegrass
Effects of leaf zeatin and zeatin riboside induced by different clipping heights on the regrowth capacity of ryegrass
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不同刈割高度诱导叶片玉米素和玉米素核苷对黑麦草再生能力的影响
DOI：
10.1007/s11284-013-1107-0
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发表时间：
2014-03
影响因子：
2
通讯作者：
王晓凌
中科院分区：
文献类型：
--
作者：
王晓凌
研究了不同刈割高度对黑麦草再生的影响。我们的研究包括三种处理条件：（1）全株黑暗，（2）仅残茬叶鞘黑暗，（3）全株光照。结果表明，在全株黑暗条件下，留茬高度越低，叶片再生生物量越低。类似的叶再生生物量的条件下，观察到黑暗的残茬叶鞘，以及整个植物的光。不同刈割高度下每根留茬的容重为叶片再生提供有机物质的潜力相对相似。因此，再生指数，计算为新生长的叶片生物量除以单位残茬重量，用于评估再生能力在不同的修剪高度下的有机物质储存在残茬的影响最小。在全株光照和一次刈割条件下，低留茬高度和高留茬高度疏根处理的叶片生物量低，再生指数高。而在全株光照和频繁修剪条件下，高留茬高度下叶片生物量和再生指数较高。此外，我们发现，叶片玉米素和玉米素核苷（Z + ZR）影响黑麦草再生和根调节叶片Z + ZR浓度。因此，我们的研究结果表明，根细胞分裂素浓度在叶片中的影响，在不同的修剪高度的黑麦草再生。
The effect of clipping height on ryegrass regrowth was investigated by examining the roles of several plant hormones. Our study consisted of three treatment conditions: (1) darkness over whole plants, (2) darkness only over stubble leaf sheaths, and (3) light over whole plants. Results showed that under darkness over whole plant, low stubble height resulted in low leaf regrowth biomass. Similar leaf regrowth biomass was observed under conditions of darkness only over stubble leaf sheaths as well as light over whole plants. Each unit weight of stubble at different clipping heights has relatively similar potential of providing stored organic substance for leaf regrowth. Therefore, regrowth index, calculated as newly grown leaf biomass divided by unit stubble weight, was used to evaluate regrowth capacity at different clipping heights under minimal influence of organic substances stored in stubbles. Under light over whole plants and single clipping, low stubble height and high stubble height with root thinning resulted in low leaf biomass and high regrowth index. On the other hand, under light over whole plants and frequent clipping high leaf biomass and regrowth index were observed in high stubble height. In addition, we found that leaf zeatin and zeatin riboside (Z + ZR) affected ryegrass regrowth and that roots regulated leaf Z + ZR concentration. Thus, our results indicate that root-derived cytokinin concentration in leaves influences ryegrass regrowth at different clipping heights.
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影响因子：
5.7
作者：
K. Shi;W. Hu;D. Dong;Yanhong Zhou;Jingquan Yu
通讯作者：
K. Shi;W. Hu;D. Dong;Yanhong Zhou;Jingquan Yu
影响因子：
3
作者：
Dodd, IC;Ngo, C;Beveridge, CA
通讯作者：
Beveridge, CA
DOI：
10.1016/j.agee.2009.03.002
发表时间：
2009-07
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
A. Schiborra;M. Gierus;H. Wan;Y. Bai;F. Taube
通讯作者：
A. Schiborra;M. Gierus;H. Wan;Y. Bai;F. Taube
DOI：
10.1614/ipsm-08-118.1
发表时间：
2009-07
期刊：
--
影响因子：
--
作者：
J. Conn;S. Seefeldt
通讯作者：
J. Conn;S. Seefeldt
影响因子：
2.7
作者：
J. Guevara;O. R. Estevez;C. Stasi;J. Gonnet
通讯作者：
J. Guevara;O. R. Estevez;C. Stasi;J. Gonnet