Seedling Establishment of Tall Fescue Exposed to Long-Term Starvation Stress

Pompeiano, Antonio; Damiani, Cláudia Roberta; Stefanini, S.; Vernieri, Paolo; Reyes, Thais Huarancca; Volterrani, Marco; Guglielminetti, Lorenzo

doi:10.1371/journal.pone.0166131

Cited by 4 publications

(3 citation statements)

References 37 publications

(38 reference statements)

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“…We noted that the IAA/ABA and GA 3 /ABA ratios, which were strongly positively related to most plant morphological parameters (e.g., RGR, leaf dry weight, root surface area, and root volume; Table 2 ), were obviously increased by MT under CA stress (Figures 5E,F ). Similar results were obtained in plants under other abiotic stresses such as, salinity and cold stress (Huang et al, 2015 ; Pompeiano et al, 2016 ).…”

Section: Discussionsupporting

confidence: 82%

Melatonin Has the Potential to Alleviate Cinnamic Acid Stress in Cucumber Seedlings

Yang

Tian

et al. 2017

Front. Plant Sci.

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Cinnamic acid (CA), which is a well-known major autotoxin secreted by the roots in cucumber continuous cropping, has been proven to exhibit inhibitory regulation of plant morphogenesis and development. Melatonin (MT) has been recently demonstrated to play important roles in alleviating plant abiotic stresses. To investigate whether MT supplementation could improve cucumber seedling growth under CA stress, we treated cucumber seeds and seedlings with/without MT under CA- or non-stress conditions, and then tested their effects on cucumber seedling growth, morphology, nutrient element content, and plant hormone. Overall, 10 μM MT best rescued cucumber seedling growth under 0.4 mM CA stress. MT was found to alleviate CA-stressed seedling growth by increasing the growth rates of cotyledons and leaves and by stimulating lateral root growth. Additionally, MT increased the allocation of newly gained dry weight in roots and improved the tolerance of cucumber seedlings to CA stress by altering the nutrient elements and hormone contents of the whole plant. These results strongly suggest that the application of MT can effectively improve cucumber seedling tolerance to CA stress through the perception and integration of morphology, nutrient element content and plant hormone signaling crosstalk.

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Section: Discussionsupporting

confidence: 82%

Melatonin Has the Potential to Alleviate Cinnamic Acid Stress in Cucumber Seedlings

Yang

Tian

et al. 2017

Front. Plant Sci.

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“…Starch content was only evaluated in the hypocotyls which are the main reserve organs. Starch was extracted and analyzed as described [24] with minor modifications. Hypocotyl samples were ground in a mortar, resuspended in 5 mL of 10 mM KOH and boiled for 1 min.…”

Section: Methodsmentioning

confidence: 99%

Physiological responses of Lepidium meyenii plants to ultraviolet-B radiation challenge

et al. 2019

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Background Ultraviolet-B (UV-B) radiation can affect several aspects ranging from plant growth to metabolic regulation. Maca is a Brassicaceae crop native to the Andes growing in above 3500 m of altitude. Although maca has been the focus mainly due to its nutraceutical properties, it remains unknown how maca plants tolerate to harsh environments, such as strong UV-B. Here, we present the first study that reports the physiological responses of maca plants to counteract and recover to repeated acute UV-B irradiation. Results In detail, plants were daily exposed to acute UV-B irradiation followed by a recovery period under controlled conditions. The results showed that repeated acute UV-B exposures reduced biomass and photosynthetic parameters, with gradual senescence induction in exposed leaves, reduction of young leaves expansion and root growth inhibition. Negative correlation between increased UV-B and recovery was observed, with marked production of new biomass in plants treated one week or more. Conclusions A differential UV-B response was observed: stress response was mainly controlled by a coordinated source-sink carbon allocation, while acclimation process may require UV-B-specific systemic defense response reflected on the phenotypic plasticity of maca plants. Moreover, these differential UV-B responses were also suggested by multifactorial analysis based on biometric and physiological data. Electronic supplementary material The online version of this article (10.1186/s12870-019-1755-5) contains supplementary material, which is available to authorized users.

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“…Starch was extracted and analyzed as previously reported 18 . Six biological replicates were considered for this analysis.…”

Section: Starch Analysismentioning

confidence: 99%

Physiological responses of maca (Lepidium meyenii Walp.) plants to UV radiation in its high-altitude mountain ecosystem

Reyes

Esparza

Crestani

et al. 2020

Sci Rep

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Ultraviolet (UV) radiation is a small fraction of the solar spectrum, which acts as a key environmental modulator of plant function affecting metabolic regulation and growth. Plant species endemic to the Andes are well adapted to the harsh features of high-altitude climate, including high UV radiation. Maca (Lepidium meyenii Walpers) is a member of Brassicaceae family native to the central Andes of peru, which grows between 3500 and 4500 m of altitude, where only highland grasses and few hardy bushes can survive. even though maca has been the focus of recent researches, mainly due to its nutraceutical properties, knowledge regarding its adaptation mechanisms to these particular natural environmental conditions is scarce. in this study, we manipulated solar UV radiation by using UV-transmitting (control) or blocking (UV-block) filters under field conditions (4138 m above the sea level) in order to understand the impact of UV on morphological and physiological parameters of maca crops over a complete growing season. Compared to the UV-blocking filter, under control condition a significant increase of hypocotyl weight was observed during the vegetative phase together with a marked leaf turnover. Although parameters conferring photosynthetic performance were not altered by UV, carbohydrate allocation between above and underground organs was affected. Control condition did not influence the content of secondary metabolites such as glucosinolates and phenolic compounds in hypocotyls, while some differences were observed in the rosettes. These differences were mainly related to leaf turnover and the protection of new young leaves in control plants. Altogether, the data suggest that maca plants respond to strong UV radiation at high altitudes by a coordinated remobilization and relocation of metabolites between source and sink organs via a possible UV signaling pathway.The Andes form the longest and one of the highest mountain ranges in the world, with a width of approximately 400 Km and over 100 peaks above 6000 m of altitude along the west coast of South America 1 . An extensive biodiversity of plant species is endemic to this region and these have been used for centuries by the native population. Interestingly, these crops are well adapted to the harsh climate of the Andes including drought, freezing temperatures, strong wind and high ultraviolet (UV) radiation 2 . UV represents a small fraction of the solar spectrum and based on its biological effects it is divided into UVC (100-280 nm), UVB (280-315 nm) and UVA (315-400 nm). However, only UVA and fraction of UVB radiation reach the Earth surface, of which UVB has the highest energy in the solar spectrum and thus has a major impact on all organisms. Moreover, levels of UVB, as well as those of UVA, vary in time and space depending on the weather, climate and geographical conditions, such as season of the year, altitude, latitude and atmospheric surface 3 .In the past decades, there has been an increased interest in the effects of UVB radiation on plant physiology and...

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Seedling Establishment of Tall Fescue Exposed to Long-Term Starvation Stress

Cited by 4 publications

References 37 publications

Melatonin Has the Potential to Alleviate Cinnamic Acid Stress in Cucumber Seedlings

Melatonin Has the Potential to Alleviate Cinnamic Acid Stress in Cucumber Seedlings

Physiological responses of Lepidium meyenii plants to ultraviolet-B radiation challenge

Physiological responses of maca (Lepidium meyenii Walp.) plants to UV radiation in its high-altitude mountain ecosystem

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