Polyamines in turions and young plants of hydrocharis morsus-ranae and utricularia intermedia

Villanueva, Victor R.; Simolat, Liisa Kaarina; Mardon, M.

doi:10.1016/s0031-9422(00)80829-8

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…Yet, Adamec (2010) has assessed that theoretically, about 30 % of the total turion's N and about 50 % of the P content could be re-utilized, as if they were stored mineral nutrients, and facilitate the sprouting of new organs without a decrease in growth rate of the sprouting turions. In Hydrocharis morsus-ranae turions, a great deal of the total organic N was found in the form of arginine (Villanueva et al 1985).…”

Section: Introductionmentioning

confidence: 99%

Dark respiration and photosynthesis of dormant and sprouting turions of aquatic plants

Adamec¹

2011

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Turions are overwintering, dormant organs, produced by aquatic plants. In spring, aerobic dark respiration (R D) and photosynthetic rates (P N) were measured as criteria of metabolic activity and photosynthetic capacity in dormant turions of 7 temperate aquatic plant species. These rates were also measured in old, original turion segments and in the newly formed shoots of sprouting turions. Two non-carnivorous rooting species (Caldesia parnassifolia, Hydrocharis morsus-ranae) and 5 carnivorous rootless species (Aldrovanda vesiculosa, Utricularia vulgaris, U. australis, U. stygia, U. bremii) were studied. R D values of dormant turions per unit fresh weight (range 1.1-5.4 mmol kg-1 FW h-1) were significantly lower (1.9-13 times) for all species, except A. vesiculosa, than those for old segments of sprouting turions (range 5.2-14 mmol kg-1 FW h-1). However, R D and P N values of old and newly formed turion segments in U. australis and U. stygia were similar. P N values of dormant turions under optimum conditions were either very low or negative, while P N values of old segments of sprouting turions of all species except H. morsus-ranae were very high (18-94 mmol kg-1 FW h-1). In a N-and P-free solution, turions of all species except A. vesiculosa formed distinct new organs after 6-20 days. In conclusion, the intensity of metabolism (both R D and P N) in sprouting turions reaches the level of adult shoots or leaves of the same species. Turions of aquatic plants also function as important storage organs for mineral nutrients (N, P, S and Mg) to ensure the growth of new organs.

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Section: Introductionmentioning

confidence: 99%

Dark respiration and photosynthesis of dormant and sprouting turions of aquatic plants

Adamec¹

2011

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“…Moreover, the dry matter content is usually between 18 and 39% in mature turions and is thus 2.5-4 times higher than that in summer shoots/leaves or newly sprouting turions of the same species [10,12,14]. Mature turions accumulate starch, free sugars, amino acids, reserve proteins, and lipids [15][16][17][18], but the knowledge of the contents of these organic storage substances in turions (except for carbohydrates [14]) is still fragmentary [10]. Starch and free sugars were shown to be the main reserve substances in mature turions of 21 plant species, and their total content ranged from 14 to 63% DW [14].…”

Section: Turions Of Aquatic Plantsmentioning

confidence: 99%

Shoots and Turions of Aquatic Plants as a Source of Fatty Acids

Strzemski,

Adamec,

Dresler

et al. 2024

Molecules

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Background: Fatty acids are essential for human health. Currently, there is a search for alternative sources of fatty acids that could supplement such sources as staple crops or fishes. Turions of aquatic plants accumulate a variety of substances such as starch, free sugars, amino acids, reserve proteins and lipids. Our aim is to see if turions can be a valuable source of fatty acids. Methods: Overwintering shoots and turions of aquatic carnivorous plants were collected. The plant material was extracted with hexane. The oils were analyzed using a gas chromatograph with mass spectrometer. Results: The dominant compound in all samples was linolenic acid. The oil content was different in turions and shoots. The oil content of the shoots was higher than that of the turions, but the proportion of fatty acids in the oils from the shoots was low in contrast to the oils from the turions. The turions of Utricularia species were shown to be composed of about 50% fatty acids. Conclusions: The turions of Utricularia species can be used to obtain oil with unsaturated fatty acids. In addition, the high fatty acid content of turions may explain their ability to survive at low temperatures.

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“…They are storage organs and in autumn, they accumulate starch (9-70 % dry weight, DW) and free sugars (in total 7-14 % DW, Winston & Gorham 1979, Kunii 1989, Ley et al 1997, Adamec 1999, 2003a,b, Weber & Noodén 2005. In Hydrocharis morsus-ranae turions, a great deal of the total organic N was found in the form of arginine (Villanueva et al 1985). Turions of all aquatic plant species usually overwinter and break their innate dormancy at the bottom of an aquatic habitat in darkness, under hypoxic or anoxic conditions, usually lightly covered by organic sediments.…”

Section: Introductionmentioning

confidence: 99%

Tissue mineral nutrient content in turions of aquatic plants: does it represent a storage function?

Adamec¹

2010

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Turions are frost resistant, vegetative dormant organs produced by aquatic plants. Tissue N, P, K, Ca, and Mg content was estimated in turions of 5 rooting, non-carnivorous plant species of the genera Caldesia, Hydrocharis, and Potamogeton and in 7 rootless carnivorous plant species of the genera Aldrovanda and Utricularia, and compared with concentrations of these nutrients in ambient waters either in the fi eld or in culture. Mean turion content of N in all species was 1.87 % DW, P 0.26 %, K 0.65 %, Ca 0.15 %, and of Mg 0.19 % DW. Of all nutrients, only turion K content differed signifi cantly between carnivorous and non-carnivorous species (0.48 ± 0.03 vs. 1.04 ± 0.10 % DW). For all plant species and sites (n = 18), turion nutrient content did not depend on nutrient concentrations in the ambient water at the time of turion initiation. Results of a literature survey conducted for the 12 plant species revealed that mean turion nutrient content was moderately (N, P) or markedly (K, Ca, Mg) lower than shoot or leaf nutrient content for the same 12 species. In conclusion, turions of aquatic plants also represent storage organs for mineral nutrients (N, P) though their storage function is presumably less distinct than in the case of carbohydrates.

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Polyamines in turions and young plants of hydrocharis morsus-ranae and utricularia intermedia

Cited by 13 publications

References 6 publications

Dark respiration and photosynthesis of dormant and sprouting turions of aquatic plants

Dark respiration and photosynthesis of dormant and sprouting turions of aquatic plants

Shoots and Turions of Aquatic Plants as a Source of Fatty Acids

Tissue mineral nutrient content in turions of aquatic plants: does it represent a storage function?

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