Title: Influences of reduced iron and magnesium on growth and photosynthetic performance of Phragmites australis subsp. americanus (North American common reed)

Willson, Kevin G.; Perantoni, Angela N.; Berry, Zachary C.; Eicholtz, Matthew I.; Tamukong, Yvette B.; Yarwood, Stephanie A.; Baldwin, Andrew H.

doi:10.1016/j.aquabot.2016.11.005

Cited by 14 publications

(4 citation statements)

References 57 publications

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“…During the experiment, the growth of control plants was repeatedly observed to slow down after three weeks and occasionally displayed the yellowed leaves with green veins characteristic of iron deficiency. Similar symptoms are also known from mature plants [42], indicating that this syndrome may affect all stages of the Phragmites life cycle. Based on the degree of yellowing observed, only D.I.…”

Section: Seedling Leaf Assaysupporting

confidence: 63%

Growth and Behavior of North American Microbes on Phragmites australis Leaves

2020

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Phragmites australis subsp. australis is a cosmopolitan wetland grass that is invasive in many regions of the world, including North America, where it co-occurs with the closely related Phragmites australis subsp. americanus. Because the difference in invasive behavior is unlikely to be related to physiological differences, we hypothesize that interactions with unique members of their microbiomes may significantly affect the behavior of each subspecies. Therefore, we systematically inoculated both plant lineages with a diverse array of 162 fungal and bacterial isolates to determine which could (1) differentiate between Phragmites hosts, (2) infect leaves at various stages of development, or (3) obtain plant-based carbon saprophytically. We found that many of the microbes isolated from Phragmites leaves behave as saprophytes. Only 1% (two taxa) were determined to be strong pathogens, 12% (20 taxa) were weakly pathogenic, and the remaining 87% were nonpathogenic. None of the isolates clearly discriminated between host plant lineages, and the Phragmites cuticle was shown to be a strong nonspecific barrier to infection. These results largely agree with the broad body of literature on leaf-associated phyllosphere microbes in Phragmites.

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Section: Seedling Leaf Assaysupporting

confidence: 63%

Growth and Behavior of North American Microbes on Phragmites australis Leaves

2020

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“…11,12 Nutrient stress reduces the photosynthesis rate of plants because, when nutrients are deficient, the synthesis of biological components required for photosynthesis can be halted, which can reduce the efficiency of photosynthesis or disrupt it altogether. 62 The root system is the first organ to be affected by changes in the nutrient content of the soil, so the growth status and configuration of the root system are important indicators of a plants ability to obtain nutrients. 63,64 Under nutrient-deficient conditions, plant roots will adapt by continuously adjusting their physiological and structural characteristics, and the degree to which they can adapt depends on their ability to change the root architecture.…”

Section: Nutrient Stressmentioning

confidence: 99%

Functions of dopamine in plants: a review

Liu

Gao

Liu

et al. 2020

Plant Signaling & Behavior

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Dopamine (3-hydroxytyramine or 3,4-dihydroxyphenethylamine) has many functions in animals, but also shows several other functions in plants. Since the discovery of dopamine in plants in 1968, many studies have provided insight into physiological and biochemical functions, and stress responses of this molecule. In this review, we describe the biosynthesis of dopamine, as well as its role in plant growth and development. In addition, endogenous or exogenously applied dopamine improved the tolerance against several abiotic stresses, such as drought, salt, and nutrient stress. There are also several studies that dopamine contributes to the plant immune response against plant disease. Dopamine affects the expression of many abiotic stresses related genes, which highlights its role as a multi-regulatory molecule and can coordinate many aspects of plant development. Our review emphasized the effects of dopamine against environmental stresses along with future research directions, which will help improve the yield of eco-friendly crops and ensure food security.

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“…North American native reed, Phragmites australis ssp. americanus, was stimulated at 11 mg/L Fe 2+ from ferrous sulfate (Willson et al, 2017), but the invasive Eurasian lineage of Phragmites australis seedling growth was inhibited by Fe 2+ as low as 1 mg/L (Batty, 2003). Soils high in free Fe 2+ adversely affected P. australis growth by creating an Fe oxide plaque on roots (Saaltink et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Quantification of potential methane emissions associated with organic matter amendments following oxic-soil inundation

2022

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Abstract. Methane (CH4) emissions are a potent contributor to global warming, and wetlands can be a significant CH4 source. In a microcosm study, we evaluated how the practice of amending soils with organic matter as part of wetland restoration projects may affect CH4 production potential. Organic amendments including hay, manure, biosolids, composted yard waste, and wood mulch were evaluated at three different levels. Using 1 L glass microcosms, we measured the production of biogenic gases over 60 d in two soils designated by texture: a sandy loam (SL) and a sandy clay loam (SCL). Fresh organic amendments increased CH4 production, leading to potentially higher global warming potential and wetland C loss, and CH4 production was more pronounced in SL. We observed biogenic gas production in two sequential steady-state phases: Phase 1 produced some CH4 but was mostly carbon dioxide (CO2), followed by Phase 2, 2 to 6 weeks later, with higher total gas and nearly equal amounts of CH4 and CO2. If this is generally true in soils, it may be appropriate to report CH4 emissions in the context of inundation duration. The CH4 from the SCL soil ranged from 0.003–0.8 cm3kg-1d-1 in Phase 1 to 0.75–28 cm3kg-1d-1 in Phase 2 and from SL range from 0.03–16 cm3kg-1d-1 in Phase 1 to 1.8–64 cm3kg-1d-1 in Phase 2. Adding fresh organic matter (e.g., hay) increased concentrations of ferrous iron (Fe2+), whereas in some cases composted organic matter decreased both Fe2+ concentrations and CH4 production. Methanogenesis normally increases following the depletion of reducible Fe; however, we observed instances where this was not the case, suggesting other biogeochemical mechanisms contributed to the shift in gas production.

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Title: Influences of reduced iron and magnesium on growth and photosynthetic performance of Phragmites australis subsp. americanus (North American common reed)

Cited by 14 publications

References 57 publications

Growth and Behavior of North American Microbes on Phragmites australis Leaves

Growth and Behavior of North American Microbes on Phragmites australis Leaves

Functions of dopamine in plants: a review

Quantification of potential methane emissions associated with organic matter amendments following oxic-soil inundation

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