Water use efficiency responses to fluctuating soil water availability in contrasting commercial sugar beet varieties.
Water use efficiency responses to fluctuating soil water availability in contrasting commercial sugar beet varieties.
复制标题
水利用效率响应对与商业甜菜品种相比，土壤水利用率波动。
DOI：
10.3389/fpls.2023.1119321
复制
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：
随着气候变化，许多甜菜生产地区将面临更炎热、更干燥的夏季。关于甜菜的耐旱性已经有很多研究，但水分利用效率（WUE）却很少受到关注。进行了一项实验，以研究波动的土壤水分亏缺如何影响从叶子到作物水平的 WUE，并确定甜菜是否适应水分亏缺以在长期内增加 WUE。对两种具有对比直立和平卧冠层的商业甜菜品种进行了检查，以确定 WUE 是否因对比的冠层结构而有所不同。甜菜在开放式塑料隧道中的 610 L 大型土箱中，在四种不同的灌溉方式（完全灌溉、单次干旱、双重干旱和持续限水）下生长。定期测量叶片气体交换、叶绿素荧光和相对含水量 (RWC)，并评估气孔密度、糖和生物量产量以及相关的 WUE、SLW 和 Δ13C。结果表明，水分亏缺通常会提高内在水分利用效率（WUEi）和干物质水分利用效率（WUEDM），但会降低产量。根据叶片气体交换和叶绿素荧光参数的评估，甜菜在严重缺水后完全恢复，除了冠层尺寸减小外，没有表现出其他对干旱的适应，因此 WUE 或干旱避免没有变化。 WUEi 的点测量显示，两个品种之间没有差异，但匍匐品种显示出较低的 Δ13C 值，以及与较低气孔密度和较大叶片 RWC 的水保守表型相关的性状。叶片叶绿素含量受水分亏缺影响，但与 WUE 的关系尚不清楚。两个品种之间 Δ13C 值的差异表明与较大 WUEi 相关的性状可能与冠层结构有关。
Many areas of sugar beet production will face hotter and drier summers as the climate changes. There has been much research on drought tolerance in sugar beet but water use efficiency (WUE) has been less of a focus. An experiment was undertaken to examine how fluctuating soil water deficits effect WUE from the leaf to the crop level and identify if sugar beet acclimates to water deficits to increase WUE in the longer term. Two commercial sugar beet varieties with contrasting upright and prostrate canopies were examined to identify if WUE differs due to contrasting canopy architecture. The sugar beet were grown under four different irrigation regimes (fully irrigated, single drought, double drought and continually water limited) in large 610 L soil boxes in an open ended polytunnel. Measurements of leaf gas exchange, chlorophyll fluorescence and relative water content (RWC) were regularly undertaken and stomatal density, sugar and biomass yields and the associated WUE, SLW and Δ13C were assessed. The results showed that water deficits generally increase intrinsic (WUEi) and dry matter (WUEDM) water use efficiency but reduce yield. Sugar beet recovered fully after severe water deficits, as assessed by leaf gas exchange and chlorophyll fluorescence parameters and, except for reducing canopy size, showed no other acclimation to drought, and therefore no changes in WUE or drought avoidance. Spot measurements of WUEi, showed no differences between the two varieties but the prostrate variety showed lower Δ13C values, and traits associated with more water conservative phenotypes of a lower stomatal density and greater leaf RWC. Leaf chlorophyll content was affected by water deficit but the relationship with WUE was unclear. The difference in Δ13C values between the two varieties suggests traits associated with greater WUEi may be linked to canopy architecture.
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影响因子：
6.9
作者：
Drake PL;Froend RH;Franks PJ
通讯作者：
Franks PJ
影响因子：
5.2
作者：
Gago, Jorge;Douthe, Cyril;Medrano, Hipolitd
通讯作者：
Medrano, Hipolitd
影响因子：
4.2
作者：
Flexas, J;Medrano, H
通讯作者：
Medrano, H
DOI：
10.1073/pnas.0501647102
发表时间：
2005-08-02
影响因子：
11.1
作者：
Angert, A;Biraud, S;Fung, I
通讯作者：
Fung, I
影响因子：
3
作者：
Buessis, Dirk;von Groll, Uritza;Altmann, Thomas
通讯作者：
Altmann, Thomas