Effects of source-sink regulation and nodal position of the main crop on the sprouting of regenerated buds and grain yield of ratoon rice.
Effects of source-sink regulation and nodal position of the main crop on the sprouting of regenerated buds and grain yield of ratoon rice.
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DOI：
10.3389/fpls.2023.1043354
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发表时间：
2023
影响因子：
5.6
通讯作者：
中科院分区：
文献类型：
--
作者：
再生稻（Oryza sativa L.）是利用主要作物收获后留下的残茬上存活的休眠芽生产第二季稻的产品。然而，关于不同节点再生芽的萌发机制却鲜有报道。通过田间试验，研究了剪叶和疏穗对宿根作物单节再生芽萌发的影响、单节再生穗对籽粒总产量的贡献及其机制。结果表明，宿根作物各节产量对籽粒总产量的贡献为D2（从上数第2个节再生的穗）>D3（从上数第3个节再生的穗）>D4（从第3节以下的下节再生的穗），其中D2和D3的贡献约占宿根作物总产量的80%。此外，剪叶处理和疏穗处理对宿季籽粒产量的影响主要是通过调节D2和D4籽粒产量对宿季总产量的相对贡献率来实现的。进一步分析表明，D2节再生芽的萌发主要受CTK含量的影响，D3节主要受GAs和CTK的调节，D4节主要受ABA和CTK的调节。但只有茎和芽中的CTK含量与单芽长度和各节芽数呈正相关。这些结果表明，CTK可能是调节再生芽萌发和不同节点籽粒产量的主要信号，这可能改变同化物向茎和芽的运输。
Ratoon rice (Oryza sativa L.) is the production of a second season rice that utilizes the dormant buds surviving on the stubble left behind after the harvest of the main crop. However, the sprouting mechanism of regenerated buds at separate nodes is rarely reported. Field experiments were conducted to examine the effects of leaf-cutting and spikelet thinning on the sprouting of regenerated buds at the separate node, the contributions of regenerated panicles at the separate node to the total grain yield in the ratoon crop, and the associated mechanism. The results showed that the contribution of separate node yields to the total grain yield in the ratoon crop was D2 (panicles regenerated from the 2nd node from the top) >D3 (panicles regenerated from the 3rd node from the top) >D4 (panicles regenerated from the lower nodes below the 3rd node), and the contribution of D2 and D3 made up approximately 80% of the total yield in the ratoon crop. In addition, the effect of leaf-cutting treatment and spikelet-thinning treatment on the grain yield of ratoon season was mainly realized by regulating the relative contribution rate of D2 and D4 grain yield to the total yield of ratoon season. Further analysis indicated that the sprouting of regenerated buds at the D2 node was mainly affected by the content of CTK, while D3 was mainly regulated by GAs and CTK, and D4 was mainly regulated by ABA and CTK. However, only the CTK content in stems and buds was positively correlated with single bud length and bud number at each nodes. These results indicated that CTK might be the main signal regulating the sprouting of regenerated buds and the grain yield at separate nodes, which might change the transport of assimilates to stems and buds.
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影响因子：
0.9
作者：
Nie, L. C.;Chen, Y. H.;Liu, M.
通讯作者：
Liu, M.
影响因子：
7.2
作者：
Chatfield, SP;Stirnberg, P;Leyser, O
通讯作者：
Leyser, O
影响因子：
5.8
作者：
Dong, Huanglin;Chen, Qian;Nie, Lixiao
通讯作者：
Nie, Lixiao
DOI：
10.1094/cm-2007-0417-01-rs
发表时间：
2007-01-01
期刊：
Crop Management
影响因子：
--
作者：
Rounds, E. W.;Mohammed, A. R.;Tarpley, L.
通讯作者：
Tarpley, L.
影响因子：
4.2
作者：
Roitsch, T;Ehness, R
通讯作者：
Ehness, R