Identification and physiological comparison of plant species that show positive or negative co-occurrence with selenium hyperaccumulators

Reynolds, R. Jason B.; Jones, Rachel; Stonehouse, Gavin C.; Mehdawi, Ali F. El; Lima, Leonardo Warzea; Fakra, Sirine C.; Pilon‐Smits, Elizabeth A. H.

doi:10.1039/c9mt00217k

Cited by 4 publications

(7 citation statements)

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“…Two wild populations were sampled, growing in their native habitat on a naturally seleniferous shale formation at Coyote Ridge Natural Area and Pine Ridge Natural Area near Fort Collins, Colorado, USA ( Figure 1 ). Both populations have been studied extensively [ 13 , 14 , 27 , 28 , 33 ], but not concerning fitness parameters in the field. The Coyote Ridge population was sampled in spring, and the Pine Ridge population was sampled in the fall.…”

Section: Resultsmentioning

confidence: 99%

“…08 04" W). Both natural areas have been described before [13,14] and are located on a seleniferous formation West of Fort Collins in the state of Colorado, in the United States of America. Samples from 23 different plants were collected in Pine Ridge natural area, and a total of 24 individual plants from the Pine Ridge natural were used.…”

Section: Discussionmentioning

confidence: 99%

“…Biological materials of different Stanleya pinnata L. (Brassicaceae) plants were collected at two different sites: Coyote Ridge natural area (geographic coordinates: latitude, 40°28′51″ N; longitude, 105°07′31″ W), and Pine Ridge natural area (geographic coordinates: latitude, 40°32′32″ N; longitude, 105°08′04″ W). Both natural areas have been described before [ 13 , 14 ] and are located on a seleniferous formation West of Fort Collins in the state of Colorado, in the United States of America. Samples from 23 different plants were collected in Pine Ridge natural area, and a total of 24 individual plants from the Pine Ridge natural were used.…”

Section: Methodsmentioning

confidence: 99%

“…The average Se level in the soil is usually below 2 μg g −1 but can reach up to 1.2 mg g −1 in soils derived from seleniferous sedimentary rocks [ 12 ]. These areas can be found in the great plains of the United States of America, including the seleniferous shale formations at Coyote Ridge and Pine Ridge Natural Areas in Colorado [ 13 , 14 ]. Some plant taxa growing in these naturally seleniferous areas can efficiently accumulate Se in their leaf tissues but display different physiological and ecological strategies to cope with the high Se concentration.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the emerging picture from earlier studies is that Se hyperaccumulator plant species can positively and negatively affect different ecological partners, depending on these partners’ Se resistance. Through these combined effects, hyperaccumulators may affect the local species composition of animals [ 32 , 33 ], plants [ 13 , 14 , 27 , 28 ], mycorrhizal, rhizosphere, and endophytic microorganisms [ 38 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

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Hyperaccumulator Stanleya pinnata: In Situ Fitness in Relation to Tissue Selenium Concentration

Lima

Castleberry

Wangeline

et al. 2022

Plants

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Earlier studies have shown that Stanleya pinnata benefits from selenium hyperaccumulation through ecological benefits and enhanced growth. However, no investigation has assayed the effects of Se hyperaccumulation on plant fitness in the field. This research aimed to analyze how variation in Se accumulation affects S. pinnata fitness, judged from physiological and biochemical performance parameters and herbivory while growing naturally on two seleniferous sites. Natural variation in Se concentration in vegetative and reproductive tissues was determined, and correlations were explored between Se levels with fitness parameters, herbivory damage, and plant defense compounds. Leaf Se concentration varied between 13- and 55-fold in the two populations, averaging 868 and 2482 mg kg−1 dry weight (DW). Furthermore, 83% and 31% of plants from the two populations showed Se hyperaccumulator levels in leaves (>1000 mg kg−1 DW). In seeds, the Se levels varied 3–4-fold and averaged 3372 and 2267 mg kg−1 DW, well above the hyperaccumulator threshold. Plant size and reproductive parameters were not correlated with Se concentration. There was significant herbivory pressure even on the highest-Se plants, likely from Se-resistant herbivores. We conclude that the variation in Se hyperaccumulation did not appear to enhance or compromise S. pinnata fitness in seleniferous habitats within the observed Se range.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hyperaccumulator Stanleya pinnata: In Situ Fitness in Relation to Tissue Selenium Concentration

Lima

Castleberry

Wangeline

et al. 2022

Plants

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Soil-plant-animal relationships and geochemistry of selenium in the Western Phosphate Resource Area (United States): A review

et al. 2021

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Selenium Metabolism in Hemp (Cannabis sativa L.)—Potential for Phytoremediation and Biofortification

Stonehouse

McCarron

Guignardi

et al. 2020

Environ. Sci. Technol.

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Selenium (Se) deficiency and toxicity affect over a billion people worldwide. Plants can mitigate both problems, via Se biofortification and phytoremediation. Here we explore the potential of hemp (Cannabis sativa L.) for these phytotechnologies. Field surveys in naturally seleniferous agricultural areas in Colorado, United States, found 15−25 μg of Se/g in seed and 5−10 μg of Se/g dry weight (DW) in flowers and leaves. Thus, 4 g of this hemp seed provides the U.S. recommended daily allowance of 55−75 μg of Se. In controlled greenhouse experiments, hemp seedlings grown in Turface supplied with 40−320 μM selenate showed complete tolerance up to 160 μM and accumulated up to 1300 mg of Se/kg shoot dry weight. Mature hemp grown in Turface supplied with 5−80 μM selenate was completely tolerant up to 40 μM selenate and accumulated up to 200 mg of Se/kg DW in leaves, flowers, and seeds. Synchrotron X-ray fluorescence and X-ray absorption spectroscopies of selenate-supplied hemp showed Se to accumulate mainly in the leaf vasculature and in the seed embryos, with predominant Se speciation in C−Se−C forms (57−75% in leaf and more than 86% in seeds). Aqueous seed extracts were found by liquid chromatography mass spectrometry to contain selenomethionine and methyl-selenocysteine (1:1−3 ratio), both excellent dietary Se sources. Floral concentrations of medicinal cannabidiol (CBD) and terpenoids were not affected by Se. We conclude that hemp has good potential for Se phytoremediation while producing Se-biofortified dietary products.

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Identification and physiological comparison of plant species that show positive or negative co-occurrence with selenium hyperaccumulators

Abstract: Reynolds and coworkers investigated effects of selenium hyperaccumulator plants on local vegetation. Shown is elemental distribution in Alyssum simplex.

Cited by 4 publications

References 24 publications

Hyperaccumulator Stanleya pinnata: In Situ Fitness in Relation to Tissue Selenium Concentration

Hyperaccumulator Stanleya pinnata: In Situ Fitness in Relation to Tissue Selenium Concentration

Soil-plant-animal relationships and geochemistry of selenium in the Western Phosphate Resource Area (United States): A review

Selenium Metabolism in Hemp (Cannabis sativa L.)—Potential for Phytoremediation and Biofortification

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