Shading may alter the colonization pattern and dominance between two invasive submerged aquatic plant species

Abstract Additional active ingredients are needed for use in aquatic systems in order to respond to new threats or treatment scenarios, enhance selectivity, reduce use rates, and to mitigate the risk of herbicide-resistance. Florpyrauxifen-benzyl is a new synthetic auxin developed for use as an aquatic herbicide. A study was conducted at North Carolina State University, in which 10 µg L−1 of 25% radiolabeled florpyrauxifen-benzyl was applied to the isolated shoot tissue of ten different aquatic plant species in order to elucidate absorption and translocation patterns in these species. Extremely high levels of shoot absorption were observed for all species and uptake was rapid. Highest shoot absorptions were observed for crested floatingheart [Nymphoides cristata (Roxb.) Kuntze] (A192 =20 µg g−1), dioecious hydrilla [Hydrilla verticillata (L.f.) Royle] (A192 =25.3 µg g−1), variable watermilfoil (Myriophyllum heterophylum Michx.) (A192 =40.1 µg g−1) and Eurasian watermilfoil (Myriophyllum spicatum L.) (A192 =25.3 µg g−1). Evidence of translocation was observed in all rooted species tested with the greatest translocation observed in N. cristata (1.28 µg g-1 at 192 HAT). The results of this study add to the growing body of knowledge surrounding the behavior of this newly registered herbicide within aquatic plants.

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Sustainable valorization of seeds from eight aquatic plant species as a source of oil and lipophilic bioactive compounds

Biomass Conversion and Biorefinery ◽

10.1007/s13399-021-01615-6 ◽

2021 ◽

Author(s):

Elise Sipeniece ◽

Inga Mišina ◽

Ying Qian ◽

Anna Grygier ◽

Natalia Sobieszczańska ◽

...

Keyword(s):

Plant Species ◽

Bioactive Compounds ◽

Aquatic Plant

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Terrestrial Morphotypes of Aquatic Plants Display Improved Seed Germination to Deal with Dry or Low-Rainfall Periods

Plants ◽

10.3390/plants10040741 ◽

2021 ◽

Vol 10 (4) ◽

pp. 741

Author(s):

Rocío Fernández-Zamudio ◽

Pablo García-Murillo ◽

Carmen Díaz-Paniagua

Keyword(s):

Seed Germination ◽

Plant Species ◽

Aquatic Plants ◽

Aquatic Plant ◽

Population Persistence ◽

Temporary Ponds ◽

Percent Germination ◽

Plant Assemblages ◽

Viable Seeds

In temporary ponds, seed germination largely determines how well aquatic plant assemblages recover after dry periods. Some aquatic plants have terrestrial morphotypes that can produce seeds even in dry years. Here, we performed an experiment to compare germination patterns for seeds produced by aquatic and terrestrial morphotypes of Ranunculus peltatus subsp. saniculifolius over the course of five inundation events. During the first inundation event, percent germination was higher for terrestrial morphotype seeds (36.1%) than for aquatic morphotype seeds (6.1%). Seed germination peaked for both groups during the second inundation event (terrestrial morphotype: 47%; aquatic morphotype: 34%). Even after all five events, some viable seeds had not yet germinated (terrestrial morphotype: 0.6%; aquatic morphotype: 5%). We also compared germination patterns for the two morphotypes in Callitriche brutia: the percent germination was higher for terrestrial morphotype seeds (79.5%) than for aquatic morphotype seeds (41.9%). Both aquatic plant species use two complementary strategies to ensure population persistence despite the unpredictable conditions of temporary ponds. First, plants can produce seeds with different dormancy periods that germinate during different inundation periods. Second, plants can produce terrestrial morphotypes, which generate more seeds during dry periods, allowing for re-establishment when conditions are once again favorable.

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Nelumbo genome database, an integrative resource for gene expression and variants of Nelumbo nucifera

Scientific Data ◽

10.1038/s41597-021-00828-8 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Hui Li ◽

Xingyu Yang ◽

Yue Zhang ◽

Zhiyan Gao ◽

Yuting Liang ◽

...

Keyword(s):

Gene Expression ◽

Plant Species ◽

Aquatic Plant ◽

Molecular Breeding ◽

Nelumbo Nucifera ◽

Sequence Analyses ◽

Genome Database ◽

Future Studies ◽

Sacred Lotus ◽

Coexpression Networks

AbstractSacred lotus (Nelumbo nucifera, or lotus) is one of the most widely grown aquatic plant species with important uses, such as in water gardening and in vegetable and herbal medicine. A public genomic database of lotus would facilitate studies of lotus and other aquatic plant species. Here, we constructed an integrative database: the Nelumbo Genome Database (NGD, http://nelumbo.biocloud.net). This database is a collection of the most updated lotus genome assembly and contains information on both gene expression in different tissues and coexpression networks. In the NGD, we also integrated genetic variants and key traits from our 62 newly sequenced lotus cultivars and 26 previously reported cultivars, which are valuable for lotus germplasm studies. As applications including BLAST, BLAT, Primer, Annotation Search, Variant and Trait Search are deployed, users can perform sequence analyses and gene searches via the NGD. Overall, the valuable genomic resources provided in the NGD will facilitate future studies on population genetics and molecular breeding of lotus.

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Reestablishment of Cabomba schwartzii (Cabombaceae), an aquatic plant species endemic to the Brazilian Amazon

Phytotaxa ◽

10.11646/phytotaxa.367.3.4 ◽

2018 ◽

Vol 367 (3) ◽

pp. 245 ◽

Cited By ~ 1

Author(s):

TIAGO D. M. BARBOSA ◽

RAFAELA J. TRAD ◽

MIKLOS M. BAJAY ◽

MARIA I. ZUCCHI ◽

MARIA DO CARMO E. DO AMARAL

Keyword(s):

Geographical Distribution ◽

Plant Species ◽

Genetic Study ◽

Aquatic Plant ◽

Brazilian Amazon ◽

Distinct Species ◽

Morphological Characters ◽

Species Description ◽

Dichotomous Key ◽

Herbarium Collections

Cabomba schwartzii was described by Rataj in 1977. The species discovered in the Brazilian Amazon was said to differ from other Cabomba species in having two sepals, two petals and a lobate petal base. According to the 1991 study of Ørgaard, C. schwartzii is similar to C. aquatica in other morphological characters (C. aquatica has flowers with three sepals and three petals) and since variation in number of floral parts is common in the genus, Ørgaard synonymized both species. After an analysis of C. schwartzii type material, other herbarium collections and location of four populations (two with C. schwartzii characteristics and two with C. aquatica characteristics), we conducted an integrated morphological and genetic study to evaluate whether or not C. schwartzii is a distinct species from C. aquatica. The results reveal the species to be distinct from each other and therefore C. schwartzii should be reestablished. The floral formula for C. schwartzii is K2 C2 A2+2 G1, versus K3 C3 A3+3 G2 for C. aquatica. A detailed species description and the geographical distribution of C. schwartzii are presented with a dichotomous key to distinguish both species, together with illustrations.

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