Changes in gravitational forces induce the modification of Arabidopsis thaliana silique pedicel positioning.
Changes in gravitational forces induce the modification of Arabidopsis thaliana silique pedicel positioning.
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重力的变化引起拟南芥长角果梗定位的改变
DOI：
10.1093/jxb/erq200
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发表时间：
2010-09
影响因子：
6.9
通讯作者：
Zheng H
中科院分区：
文献类型：
--
作者：
Wei N;Tan C;Qi B;Zhang Y;Xu G;Zheng H
芽和根的伸展通常相对于重力矢量保持特定的角度，并且该角度可以在器官发育期间和响应于环境刺激而改变。然而，侧向器官向重力反应的细胞和分子机制仍然知之甚少。在这里，它表明，年轻的角果拟南芥植物进行3-D回转器旋转表现出automorphogenesis与花梗和主茎之间的生长角度增加。此外，3-D回转器旋转处理显着影响了花梗中维管束的发育，并导致分支点部位间隙细胞的扩大以及KNAT 1表达的减少。正常和空角果之间进行的比较表明，只有正常发育的种子角果的花梗可以改变他们的生长角度下的3-D回转器旋转条件，而空角果的花梗失去了响应改变重力环境的能力。这些结果表明，角果对重力变化的反应依赖于种子的正常发育，并可能通过花梗中的维管束细胞和分支点处的间隙细胞介导。
The laterals of both shoots and roots often maintain a particular angle with respect to the gravity vector, and this angle can change during organ development and in response to environmental stimuli. However, the cellular and molecular mechanisms of the lateral organ gravitropic response are still poorly understood. Here it is demonstrated that the young siliques of Arabidopsis thalinana plants subjected to 3-D clinostat rotation exhibited automorphogenesis with increased growth angles between pedicels and the main stem. In addition, the 3-D clinostat rotation treatment significantly influenced the development of vascular bundles in the pedicel and caused an enlargement of gap cells at the branch point site together with a decrease in KNAT1 expression. Comparisons performed between normal and empty siliques revealed that only the pedicels of siliques with normally developing seeds could change their growth angle under the 3-D clinostat rotational condition, while the pedicels of the empty siliques lost the ability to respond to the altered gravity environment. These results indicate that the response of siliques to altered gravity depends on the normal development of seeds, and may be mediated by vascular bundle cells in the pedicel and gap cells at branch point sites.
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影响因子：
2.7
作者：
Douglas, SJ;Riggs, CD
通讯作者：
Riggs, CD
影响因子：
2.8
作者：
KOHJI, J;YAMAMOTO, R;MASUDA, Y
通讯作者：
MASUDA, Y
影响因子：
6.4
作者：
Driss-Ecole, Dominique;Legue, Valerie;Perbal, Gerald
通讯作者：
Perbal, Gerald
影响因子：
7.4
作者：
Chen, RJ;Rosen, E;Masson, PH
通讯作者：
Masson, PH
影响因子：
4.9
作者：
Mano, E;Horiguchi, G;Tsukaya, H
通讯作者：
Tsukaya, H