Canopy architectural and physiological characterization of near-isogenic wheat lines differing in the tiller inhibition gene tin.
Canopy architectural and physiological characterization of near-isogenic wheat lines differing in the tiller inhibition gene tin.
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DOI：
10.3389/fpls.2014.00617
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发表时间：
2014
影响因子：
5.6
通讯作者：
Rebetzke G
中科院分区：
文献类型：
--
作者：
Moeller C;Evers JB;Rebetzke G
分蘖是植物构型的核心组成部分，通过影响光的截获进而影响植物和作物的生长。不同的分蘖抑制（锡）基因和代表两个遗传背景的近等基因系（NILs）的分蘖动态，器官大小分布，叶面积，光截获，红：远红比，叶绿素含量进行了研究。与自由分蘖的近等基因系相比，锡系的分蘖停止得更早，以减少后期一次分蘖和二次分蘖的频率，并表明含锡系的遗传分蘖可塑性较低。器官大小的分布沿着枝不同的近等基因系对比锡。节间伸长开始在一个较低的植物体，和花序梗短的锡线。锡线的旗叶较大，最长的叶片在较高的植物体中观察锡比在自由分蘖线。总叶面积减少锡线，和非锡线投资更多的叶面积在中间冠层高度。与自由分蘖的姐妹篇株（0.62-0.63）相比，锡系的分蘖经济（含籽枝与产生的枝数的比率）高10%（0.73-0.76）。在最大分蘖数时，在光合有效辐射为49-53%和30- 33%的水平下，在植株基部的红光：远红光（被认为是诱导分蘖停止的光质刺激）比率在锡系中为0.18-0.22，在自由分蘖系中为0.09-0.11。锡线截获较少的辐射相比，他们的自由分蘖的姐妹篇一旦基因型差异分蘖数已经建立，并保持绿色叶面积在较低的冠层后进入本赛季。更大的消光系数（K）在锡线之前，但减少K后，穗出现表明，光截获的差异对比锡的近红外线之间不能单独解释叶面积，但几何和光学冠层特性的贡献。专门开发的近等基因系的仔细表征是完善的生理为基础的分蘖模型的发展，以提高对用于谷物改良的建筑性状的价值的理解。
Tillering is a core constituent of plant architecture, and influences light interception to affect plant and crop performance. Near-isogenic lines (NILs) varying for a tiller inhibition (tin) gene and representing two genetic backgrounds were investigated for tillering dynamics, organ size distribution, leaf area, light interception, red: far-red ratio, and chlorophyll content. Tillering ceased earlier in the tin lines to reduce the frequencies of later primary and secondary tillers compared to the free-tillering NILs, and demonstrated the genetically lower tillering plasticity of tin-containing lines. The distribution of organ sizes along shoots varied between NILs contrasting for tin. Internode elongation commenced at a lower phytomer, and the peduncle was shorter in the tin lines. The flag leaves of tin lines were larger, and the longest leaf blades were observed at higher phytomers in the tin than in free-tillering lines. Total leaf area was reduced in tin lines, and non-tin lines invested more leaf area at mid-canopy height. The tiller economy (ratio of seed-bearing shoots to numbers of shoots produced) was 10% greater in the tin lines (0.73–0.76) compared to the free-tillering sisters (0.62–0.63). At maximum tiller number, the red: far-red ratio (light quality stimulus that is thought to induce the cessation of tillering) at the plant-base was 0.18–0.22 in tin lines and 0.09–0.11 in free-tillering lines at levels of photosynthetic active radiation of 49–53% and 30–33%, respectively. The tin lines intercepted less radiation compared to their free-tillering sisters once genotypic differences in tiller numbers had established, and maintained green leaf area in the lower canopy later into the season. Greater light extinction coefficients (k) in tin lines prior to, but reduced k after, spike emergence indicated that differences in light interception between NILs contrasting in tin cannot be explained by leaf area alone but that geometric and optical canopy properties contributed. The careful characterization of specifically-developed NILs is refining the development of a physiology-based model for tillering to improve understanding of the value of architectural traits for use in cereal improvement.
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影响因子：
2
作者：
Foulkes, MJ;Scott, RK;Sylvester-Bradley, R
通讯作者：
Sylvester-Bradley, R
影响因子：
5.8
作者：
Berry, PM;Spink, JH;Wade, A
通讯作者：
Wade, A
DOI：
10.1071/pp9860381
发表时间：
1986-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
ATSMON, D;BUSH, MG;EVANS, LT
通讯作者：
EVANS, LT
影响因子：
7.4
作者：
Bertheloot, Jessica;Martre, Pierre;Andrieu, Bruno
通讯作者：
Andrieu, Bruno
影响因子：
5.6
作者：
Evers JB;Vos J
通讯作者：
Vos J