Effects of low pressure and hypoxia on growth and development of wheat

Guo, Sen; Tang, Yongkang; Gao, Feng; Ai, Weidang; Qin, Lifeng

doi:10.1016/j.actaastro.2008.02.006

Cited by 23 publications

(10 citation statements)

References 9 publications

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“…After prolonged asphyxiation periods, visible symptoms, such as wilting, followed by defoliation of the aerial part, appear before the lethal phase. The resistance to root asphyxiation varies depending on the plant species (e.g., from a few days for lupine to a few weeks for wheat) 14 . Plants can recover their normal physiological activities if root aeration is restored before the lethal phase.…”

Section: Discussionmentioning

confidence: 99%

Soil hypoxia induced by an organic-material mulching technique stimulates the bamboo rhizome up-floating of Phyllostachys praecox

Zhuang

Gui

2017

Sci Rep

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Phyllostachys praecox bamboo stands significantly recede after 3 or 4 years using an organic-material mulching technique consecutively. We hypothesized that the bamboo recession is caused by the up-floating of underground rhizome stimulated by soil hypoxia through the mulching technique. This study aimed to validate this hypothesis by field investigation. Bamboo underground rhizome distribution in the soil profile of P. praecox subjected to various mulching times was investigated. Results showed that bamboo rhizome weights and lengths increased with increased mulching time. However, after 4 years of mulching, the number of fresh rhizomes decreased significantly, and more than 50% of rhizomes floated upward to the shallow soil layer (0–10 cm). Moreover, the 0–10 cm soil layer suffered severe acidification that severely impeded bamboo-rhizome growth. The soil hypoxia induced by the mulching technique must be responsible for the bamboo rhizome up-floating. We confirmed that bamboo rhizome up-floating was the critical factor that caused the bamboo growth to recede under the mulching technique. Therefore, managing this bamboo rhizome up-floating is the key to sustainable bamboo production. The effect of soil hypoxia in the absence of flooding or waterlogging on plant root growth also warrants further and extensive study.

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Section: Discussionmentioning

confidence: 99%

Soil hypoxia induced by an organic-material mulching technique stimulates the bamboo rhizome up-floating of Phyllostachys praecox

Zhuang

Gui

2017

Sci Rep

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“…They observed increased vegetative growth under hypoxia and under high CO2 (1000 ppm). Quebedeaux and Hardy observed a decline in wheat seed production under hypoxia (1973), whereas Guo et al (2008) observed slightly increased yield at 50 and 25% PAL, with yield declining to near zero at 12% PAL. Thus, although experimental results are somewhat mixed, hypoxia generally tends to increase vegetative growth for C3 plants but not for C4 plants, consistent with differences in mechanisms for CO2 acquisition and O2 release (Raven 1991).…”

Section: Experiments On Oxygen and Sizementioning

confidence: 99%

The evolutionary consequences of oxygenic photosynthesis: a body size perspective

et al. 2010

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The high concentration of molecular oxygen in Earth's atmosphere is arguably the most conspicuous and geologically important signature of life. Earth's early atmosphere lacked oxygen; accumulation began after the evolution of oxygenic photosynthesis in cyanobacteria around 3.0-2.5 billion years ago (Gya). Concentrations of oxygen have since varied, first reaching near-modern values ~600 million years ago (Mya). These fluctuations have been hypothesized to constrain many biological patterns, among them the evolution of body size. Here, we review the state of knowledge relating oxygen availability to body size. Laboratory studies increasingly illuminate the mechanisms by which organisms can adapt physiologically to the variation in oxygen availability, but the extent to which these findings can be extrapolated to evolutionary timescales remains poorly understood. Experiments confirm that animal size is limited by experimental hypoxia, but show that plant vegetative growth is enhanced due to

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“…The experiments were conducted in low-pressure plant cultivation facilities (LPPCF) that were capable of controlling the TP and gas partial pressure under ambient and reduced pressure conditions (Guo et al, 2008). The TP, pO 2 and carbon dioxide partial pressure (pCO 2 ), temperature, and relative humidity of the atmosphere in the growth chambers were controlled and monitored in the experiments.…”

Section: Experimental Facilitymentioning

confidence: 99%