Alleviative effects of mixed-cropping with rice on the growth inhibition of pearl millet caused by flooding at reproductive stage
Alleviative effects of mixed-cropping with rice on the growth inhibition of pearl millet caused by flooding at reproductive stage
复制标题
稻作混作对珍珠谷繁殖期淹水抑制的缓解作用
DOI：
10.1080/15427528.2018.1542364
复制
发表时间：
2018
影响因子：
1.3
通讯作者：
M. Iijima
中科院分区：
文献类型：
--
作者：
S. Awala;K. Yamane;Yasuhiro Izumi;O. Mwandemele;M. Iijima
摘要淹水已在全球范围内变得普遍，因此需要适应逆境的栽培技术。我们开发了一种名为“密植”的技术，使用的是适应洪水的水稻(Oryza sativa L.)以及根系缠绕的旱地作物，表明这种技术可以减轻洪水对旱地作物的损害。然而，植物在生殖阶段的反应还没有被研究过。在本研究中，我们评估了密植对纳米比亚北部繁殖阶段淹水对珍珠谷子(Pennisetum Glucum)生长抑制和生理伤害的缓解效果。使用珍珠谷子和NERICA4(Oryza spp.，栽培野生稻和非洲野生稻的异种)。将四周龄的单作和混作珍珠谷子移栽22天，然后进行淹水处理28天。淹水胁迫显著降低了单粒珍珠谷子的生长和生理参数，与未淹水的单粒珍珠谷和混作珍珠谷子相比，在14d的恢复期内这些参数没有恢复。另一方面，水灾对混作珍珠谷子的危害得到了抑制。因此，混作减轻了珍珠谷子生殖阶段淹水造成的缺氧胁迫，有助于促进恢复期后的生长。这一结果表明，在半干旱的非洲国家纳米比亚，密植水稻不仅有助于减轻珍珠谷子营养阶段的洪涝灾害，也有助于减轻珍珠谷子繁殖阶段的洪涝灾害。
ABSTRACT Flooding has globally become common, and thus cultivation techniques to adapt to the stress are required. We have developed a technique called “close mixed-planting” using flood-adapted rice (Oryza sativa L.) and upland crops with tangled root systems, showing that this technique can mitigate the damage caused to upland crops by flooding. However, the plant response during the reproductive stage has not yet been examined. In this study, we estimated the alleviative effects of close mixed-planting on the growth inhibition and physiological damage to pearl millet (Pennisetum glaucum) caused by flooding at the reproductive stage in northern Namibia. Pearl millet and NERICA4 (Oryza spp., interspecies of O. sativa and O. glaberrima) were used. Four-week-old single- and mixed-crop pearl millets were transplanted and grown for 22 days, and then flooding treatment was administered for 28 days. The growth and physiological parameters of single pearl millet were significantly decreased by flooding stress, and the parameters did not recover during a 14-day recovery period compared with those of unflooded single and mix-cropped pearl millet. On the other hand, the damage to mix-cropped pearl millet by flooding was suppressed. Thus, the mixed-cropping mitigated the anoxic stress of pearl millet caused by flooding at the reproductive stage and contributed to the improved growth after the recovery period. This result suggested that the close mixed-planting with rice can contribute to the mitigation of flooding damage not only at the vegetative stage but also at the reproductive stage of pearl millet in the semi-arid African country, Namibia.
稻混秧缓解半干旱谷物洪涝胁迫的田间评价
影响因子：
5.2
作者：
Awala;S. K.;Yamane;K.;Izumi;Y.;Fujioka;Y.;Watanabe;Y.;Kaede C. W.;Kawato;Y.;Mwandemele;O. D.;& Iijima;M.
通讯作者：
M.
影响因子：
2.5
作者：
M. Iijima;Y. Hirooka;Yoshimasa Kawato;Y. Watanabe;K. Wada;Nodoka Shinohara;Pamwenafye I. Nanhapo
通讯作者：
M. Iijima;Y. Hirooka;Yoshimasa Kawato;Y. Watanabe;K. Wada;Nodoka Shinohara;Pamwenafye I. Nanhapo