Root anatomical phenes predict root penetration ability and biomechanical properties in maize (Zea Mays).
Root anatomical phenes predict root penetration ability and biomechanical properties in maize (Zea Mays).
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DOI：
10.1093/jxb/erv121
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发表时间：
2015-06
影响因子：
6.9
通讯作者：
Lynch JP
中科院分区：
文献类型：
--
作者：
Chimungu JG;Loades KW;Lynch JP
根的弯曲、抗张强度和穿透硬土的能力与作物育种计划中选择的解剖学表型有关。根穿透坚硬土壤的能力对于作物生产力很重要，但对有助于这种能力的特定根表型知之甚少。根的穿透性和生物力学特性可能因解剖结构的不同而不同。目前还没有关于牙根解剖特征对牙根穿透性和生物力学影响的资料。根穿透能力进行了评价，使用蜡层系统。在温室和田间生长的植物根中评价根拉伸和弯曲强度。根解剖phenes被认为是更好的预测根穿透性比根直径本身，并与较小的远端皮质区细胞大小。较小的外皮质区细胞在稳定牙根防止椭圆化和降低穿透过程中局部屈曲和塌陷的风险方面发挥重要作用，从而增加硬层的牙根穿透。中柱直径的使用被认为是一个更好的预测根的抗拉强度比根直径。皮质厚度、皮质细胞计数、皮质细胞壁面积和远端皮质细胞大小是比根径更强的牙根弯曲强度预测因子。我们的研究结果表明，根系解剖表型是高强度层根系穿透性和根系生物力学特性的重要预测因素。
Root bending, tensile strength, and ability to penetrate hard soil are related to anatomical phenes that are subject to selection in crop breeding programs. The ability of roots to penetrate hard soil is important for crop productivity but specific root phenes contributing to this ability are poorly understood. Root penetrability and biomechanical properties are likely to vary in the root system dependent on anatomical structure. No information is available to date on the influence of root anatomical phenes on root penetrability and biomechanics. Root penetration ability was evaluated using a wax layer system. Root tensile and bending strength were evaluated in plant roots grown in the greenhouse and in the field. Root anatomical phenes were found to be better predictors of root penetrability than root diameter per se and associated with smaller distal cortical region cell size. Smaller outer cortical region cells play an important role in stabilizing the root against ovalization and reducing the risk of local buckling and collapse during penetration, thereby increasing root penetration of hard layers. The use of stele diameter was found to be a better predictor of root tensile strength than root diameter. Cortical thickness, cortical cell count, cortical cell wall area and distal cortical cell size were stronger predictors of root bend strength than root diameter. Our results indicate that root anatomical phenes are important predictors for root penetrability of high-strength layers and root biomechanical properties.
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影响因子：
2.8
作者：
COUTTS, MP
通讯作者：
COUTTS, MP
影响因子：
4.2
作者：
Goodman, AM;Ennos, AR
通讯作者：
Ennos, AR
影响因子：
5.8
作者：
Clark, LJ;Cope, RE;Wade, LJ
通讯作者：
Wade, LJ
DOI：
10.1098/rstb.1990.0175
发表时间：
1990-09-29
影响因子：
6.3
作者：
HETTIARATCHI, DRP
通讯作者：
HETTIARATCHI, DRP
影响因子：
4.9
作者：
Cairns, JE;Audebert, A;Mullins, CE
通讯作者：
Mullins, CE