The Ecology and Conservation of Wild Rice, Zizania palustris L., in North America

Biesboer, David D.

doi:10.1590/s2179-975x2319

Cited by 11 publications

(12 citation statements)

References 2 publications

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“…Northern wild rice (NWR; Zizania palustris L.) is an outcrossing, annual aquatic grass in the Poaceae family. The species grows naturally in lakes and streams across the Great Lakes region of the United States and Canada, and provides food and habitat to many species in aquatic ecosystems (Steeves 1952;Huseby 1997;Biesboer 2019). In addition to natural stands, NWR has been cultivated in irrigated paddies since the 1950s, with the largest production in Minnesota and California (Oelke and Porter 2016).…”

Section: Introductionmentioning

confidence: 99%

Dormancy breaking treatments in Northern Wild Rice (Zizania palustris L.) seed suggest a physiological source of Dormancy

2022

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Dormancy is a limiting factor for breeding in northern wild rice (NWR; Zizania palustris L). This study developed a dormancy curve and tested a combination of scari cation and hormone treatments, across three timepoints, for their ability to break dormancy in NWR and produce viable seedlings and plants. A dormancy curve was established across 9 months post-harvest, which showed maximum germination (95 %) by 17 weeks post-harvest and high germination (≥81 %) through the rest of the testing period. Next, dormancy breaking treatments were tested. At 1 week post-harvest, few seeds germinated (≤ 15 %) across all treatment combinations. However, sulfuric acid increased germination shortly after harvest (5.8 %), compared to water (0.5 %) and NaClO (0 %) but resulted in stunted seedlings, all but one of which died shortly thereafter. At 7 weeks, sulfuric acid treated seeds did not result in signi cantly higher germination than water and maximum germination was still below 15%. By 11 weeks post-harvest, the water treatments had the highest germination and resulted in the most viable plants, indicating that dormancy had begun to break naturally and exceeded the effect of the other scari cation treatments. Hormonal treatments had no signi cant effect on germination or seed viability and no strong conclusions could be drawn about their effect on seedling or plant health. Due to the inability of early germinated seed to consistently produce viable plants and the increase in germination following su cient cold storage, it is likely that NWR seed has intermediate or deep physiological dormancy.

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Section: Introductionmentioning

confidence: 99%

Dormancy breaking treatments in Northern Wild Rice (Zizania palustris L.) seed suggest a physiological source of Dormancy

2022

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“…Wild rice was a major component of the diet of the native people in this region. Besides its economic and cultural importance, wild rice played an important ecological role in wetlands as a food source for several wildlife species [3].…”

Section: Introductionmentioning

confidence: 99%

Health Risk from Toxic Metals in Wild Rice Grown in Copper Mining-Impacted Sediments

et al. 2022

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Northern wild rice is of great dietary and cultural importance to the Native American population in the Upper Peninsula of Michigan. Millions of tons of mine tailings were discharged into Lake Superior and other inland lakes during the copper mining boom in the early 20th century in this area. This includes L’Anse Bay, located within the Keweenaw Bay Indian Community (KBIC) reservation. Since wild rice restoration is being encouraged by the KBIC, we investigated the distribution of toxic metals in sediments, water, and wild rice and their potential impact on human health from two locations. Sand Point sloughs on L’Anse Bay and a nearby inland lake, Lake Plumbago, were sampled for sediment, water, and wild rice, and the potential human health risk from dietary exposure to toxic metals in wild rice was assessed. Arsenic stood out as the element that had the highest bioaccumulation at both locations. Risk calculations showed that the hazard index (HI) value for wild rice seeds from both sites was high. Data indicate both carcinogenic and non-carcinogenic risks for As from wild rice in Sand Point sloughs and Lake Plumbago, and carcinogenic risks for Cd and Cr at Lake Plumbago.

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“…The species grows naturally in lakes and streams across the Great Lakes region of the United States and Canada, and provides food and habitat to many species in aquatic ecosystems (Steeves, 1952;Huseby, 1997;Biesboer, 2019). In addition to natural stands, NWR has been cultivated in irrigated paddies since the 1950s, with the largest production in Minnesota and California (Oelke and Porter, 2016).…”

Section: Introductionmentioning

confidence: 99%

Dormancy Breaking Treatments in Northern Wild Rice (Zizania palustris L.) Seed Suggest a Physiological Source of Dormancy

McGilp

Semington

Kimball

2021

Preprint

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Dormancy is a limiting factor for breeding in northern wild rice (NWR; Zizania palustris L). This study developed a dormancy curve and tested a combination of scarification and hormone treatments, across three timepoints, for their ability to break dormancy in NWR and produce viable seedlings and plants. A dormancy curve was established across 9 months post-harvest, which showed maximum germination (95 %) by 17 weeks post-harvest and high germination (≥81 %) through the rest of the testing period. Next, dormancy breaking treatments were tested. At 1 week post-harvest, few seeds germinated (≤ 15 %) across all treatment combinations. However, sulfuric acid increased germination shortly after harvest (5.8 %), compared to water (0.5 %) and NaClO (0 %) but resulted in stunted seedlings, all but one of which died shortly thereafter. At 7 weeks, sulfuric acid treated seeds did not result in significantly higher germination than water and maximum germination was still below 15%. By 11 weeks post-harvest, the water treatments had the highest germination and resulted in the most viable plants, indicating that dormancy had begun to break naturally and exceeded the effect of the other scarification treatments. Hormonal treatments had no significant effect on germination or seed viability and no strong conclusions could be drawn about their effect on seedling or plant health. Due to the inability of early germinated seed to consistently produce viable plants and the increase in germination following sufficient cold storage, it is likely that NWR seed has intermediate or deep physiological dormancy.

show abstract

The Ecology and Conservation of Wild Rice, Zizania palustris L., in North America

Cited by 11 publications

References 2 publications

Dormancy breaking treatments in Northern Wild Rice (Zizania palustris L.) seed suggest a physiological source of Dormancy

Dormancy breaking treatments in Northern Wild Rice (Zizania palustris L.) seed suggest a physiological source of Dormancy

Health Risk from Toxic Metals in Wild Rice Grown in Copper Mining-Impacted Sediments

Dormancy Breaking Treatments in Northern Wild Rice (Zizania palustris L.) Seed Suggest a Physiological Source of Dormancy

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