Germination requirements in a population of Typha latifolia

Lombardi, Tiziana; Fochetti, T; Bertacchi, Andrea; Onnis, A

doi:10.1016/s0304-3770(96)01096-0

Cited by 29 publications

(32 citation statements)

References 18 publications

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“…The plant must produce sufficient viable seeds as well. Physioecological requirements of germination (e.g., temperature regimes, lighting requirements, after‐ripening conditions) must be determined if not already known [136]. Thus, the difficulty in obtaining reliable seeds for culture has slowed research to develop phytotoxicity tests using estuarine and marine vascular plants.…”

Section: Present and Future Needs For Developing Estuarine Plant Testsmentioning

confidence: 99%

Use of plants for toxicity assessment of estuarine ecosystems

Lytle

2001

Enviro Toxic and Chemistry

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Abstract-Estuarine ecosystems are being rapidly degraded by environmental toxicants from municipal and industrial wastes, agricultural runoff, recreational boating, shipping, and coastal development, ranking them as the most anthropogenically degraded habitat types on earth. Toxicity tests are used to establish links between adverse ecological effects and the toxicity of environmental chemicals. However, most toxicity tests used for regulating the release of chemicals into the environment have used animals as test species, with the erroneous assumption that toxicant levels protective of fish or invertebrates are also protective of plants. Most plant toxicity tests have used terrestrial crop plants, whereas the few aquatic test species used have been primarily freshwater algae. Even though estuarine and marine vascular plants are highly vulnerable to environmental chemicals, phytotoxicity studies using native coastal plants have been limited, and no such studies are required for testing by regulating agencies. The relevance of toxicity tests of estuarine sediments and of wastes entering the estuary should depend on the use of estuarine and marine plant species. This review summarizes toxicity testing of marine plants used in biomonitoring, phytotoxicity, biotransformations of toxicants, bioaccumulation, and phytoremediation. Challenges to marine plant testing are discussed and include developing standard test protocols, identifying species with minimal salinity and toxicant interaction, defining and choosing a suitable sediment for sedimentbound toxicant testing, selecting endpoints with low variability, producing viable seeds, and culturing test plants. Progress in acquiring a suitable database is being made, but at a rate that is inadequate to create the sound, scientific foundation needed for safeguarding our estuarine ecosystems in the near future.

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Section: Present and Future Needs For Developing Estuarine Plant Testsmentioning

confidence: 99%

Use of plants for toxicity assessment of estuarine ecosystems

Lytle

2001

Enviro Toxic and Chemistry

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“…In seed viability assessment, many conventional methods including the standard germination test, electrical conductivity test, seedling growth test, accelerated aging test and triphenyltetrazolium chloride (TTC) quantitative analysis have been proposed [1,2]. However, several shortcomings still exist in these methods, such as invasiveness, huge amount of test work needed, long test periods, low accuracy and obvious subjective effects [3].…”

Section: Introductionmentioning

confidence: 99%

A Classification Method for Seed Viability Assessment with Infrared Thermography

Men

Yan

Liu

et al. 2017

Sensors

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This paper presents a viability assessment method for Pisum sativum L. seeds based on the infrared thermography technique. In this work, different artificial treatments were conducted to prepare seeds samples with different viability. Thermal images and visible images were recorded every five minutes during the standard five day germination test. After the test, the root length of each sample was measured, which can be used as the viability index of that seed. Each individual seed area in the visible images was segmented with an edge detection method, and the average temperature of the corresponding area in the infrared images was calculated as the representative temperature for this seed at that time. The temperature curve of each seed during germination was plotted. Thirteen characteristic parameters extracted from the temperature curve were analyzed to show the difference of the temperature fluctuations between the seeds samples with different viability. With above parameters, support vector machine (SVM) was used to classify the seed samples into three categories: viable, aged and dead according to the root length, the classification accuracy rate was 95%. On this basis, with the temperature data of only the first three hours during the germination, another SVM model was proposed to classify the seed samples, and the accuracy rate was about 91.67%. From these experimental results, it can be seen that infrared thermography can be applied for the prediction of seed viability, based on the SVM algorithm.

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“…The germination is enhanced by diurnal changes in temperature (Lombardi et al, 1997) and low oxygen concentrations with germination ranging between 80% and 100% under optimal conditions (Morinaga, 1926;Sifton, 1959;Bonnewell et al, 1983). A study of seed germination of T. latifolia and T. domingensis as a function of nutrient level indicated that the germination requirements in T. domingensis are similar to those in T. latifolia (Stewart et al, 1997).…”

Section: Introductionmentioning

confidence: 99%