Patterns of dry-matter distribution in transplanted populations of Trifolium repens and its bearing on ecological interpretations

An experiment was carried out to examine the degree of plasticity of various plant parts in Trifolium repens L. when transplanted from 12 widely different sites to a common garden. Plasticity was structure specific. Inflorescence production displayed the most plastic response after transplanting; leaf and root production were less plastic. Stolon production did not show a plastic response to transplanting but did show significant between-plant variation. These responses may be explained by past selection pressures, acting to maintain the structure which is most important for survival under conditions which have deleterious effects on plant growth. An alternate interpretation suggests that the range of responses may also be explained by different developmental patterns.

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Plasticity in growth and patterns of dry matter distribution of two genotypes of Trifolium repens grown in different environments of neighbours

Canadian Journal of Botany ◽

10.1139/b83-237 ◽

1983 ◽

Vol 61 (8) ◽

pp. 2186-2194 ◽

Cited By ~ 17

Author(s):

Roy Turkington

Keyword(s):

Trifolium Repens ◽

Dry Matter ◽

Poa Pratensis ◽

Dactylis Glomerata ◽

Hostile Environment ◽

Matter Distribution ◽

Dry Matter Distribution ◽

Trade Off ◽

Mobile Plant ◽

Trifolium Repens L

Replicates of two genotypes of Trifolium repens L., collected from a Poa pratensis dominated sward and a Dactylis glomerata dominated sward, respectively, were grown in swards composed of various proportions of P. pratensis and D. glomerata. These swards represented a range of environments of neighbours; an increasing proportion of P. pratensis was considered as an increasingly alien environment for individuals of T. repens collected from the D. glomerata dominated site, and vice-versa for the individuals from the P. pratensis dominated site. The individuals of T. repens were harvested on five occasions over a period of 27 months. Both genotypes responded to increasingly alien environments by producing more inflorescences and by distributing proportionately more dry matter to inflorescence production. Some evidence is also presented which suggests that allocation to stolons and inflorescences are alternatives and the balance of the trade off is dependent on the advantages of possibly producing new, better adapted offspring from seed, against the chances of a wandering stolon encountering a less hostile environment. Results are discussed in the context of environmental alienness, a major source of which is the different relative proportions of neighbours. The various genotypes of organisms which a relatively mobile plant species encounters are a major source of this environmental, or biotic, alienness.

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End-of-Day Light Quality Effects on Growth and Development of Watermelon Plants

HortScience ◽

10.21273/hortsci.32.4.601e ◽

1997 ◽

Vol 32 (4) ◽

pp. 601E-601

Author(s):

N.K. Damayanthi Ranwala ◽

Dennis R. Decoteau

Keyword(s):

Dry Matter ◽

Light Quality ◽

Distribution Patterns ◽

Dry Mass ◽

Matter Distribution ◽

Dry Matter Partitioning ◽

Dry Matter Distribution ◽

Plant Parts ◽

Total Plant ◽

Plant Dry Mass

End-of-day (EOD) red (R) or far-red (FR) light treatments were used to study phytochrome-regulated growth and dry matter distribution in 2-week-old watermelon plants. Plants were exposed to low-intensity R or FR light for 15 min at the end of photoperiod for 9 consecutive days. End-of-day FR increased the petiole elongation in the first two leaves, which was accompanied by higher dry matter partitioning to the petioles after 3 days of treatments. However, total plant dry mass (above ground) in FR-treated plants increased significantly after 6 days of treatments. This indicates EOD FR regulated dry matter compensation among plant parts at the early stages of EOD light treatments, allowing plants to better adapt to the environment. Net CO2 assimilation rate in the second leaf of FR-treated plants also increased. Phytochrome involvement in these processes is suggested, since growth and dry matter distribution patterns were reversible when plants were treated with FR immediately followed by R.

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Enzimaktivitások és a fluoreszkáló pszeudomonasz csíraszámok változása a fehér lóhere (Trifolium repens L.) rizoszférájában sókezelés (NaCl) hatására

Agrokémia és Talajtan ◽

10.1556/agrokem.53.2004.3-4.11 ◽

2004 ◽

Vol 53 (3-4) ◽

pp. 367-376 ◽

Cited By ~ 2

Author(s):

A. A. Khalif ◽

H. Abdorhim ◽

Hosam E. H. T. Bayoumi ◽

Anna Füzy ◽

Mihály Kecskés

Keyword(s):

Pseudomonas Putida ◽

Trifolium Repens ◽

Trifolium Repens L

Üvegházi körülmények között savanyú barna erdotalajban nevelt fehér here (Trifolium repens L.) növények rizoszférájának sókezelés hatására bekövetkezo változását ellenoriztük. Megvizsgáltuk a különbözo sókoncentrációknak (0, 0,2, 0,4, 0,6 és 0,8 tömeg %) a baktériumnépesség összetételére és a különbözo talajenzimek aktivitására gyakorolt hatását. Megállapítottuk, hogy a talaj sótartalma közvetlenül befolyásolta a rizoszférában található fluoreszkáló pszeudomonaszok csíraszámát. A legsurubb populáció a 0,2% NaCl-ot tartalmazó talajban volt mérheto, ahol a fluoreszkáló pszeudomonaszok között a Pseudomonas putida és a P. fluorescens fordultak elo a legnagyobb számban. A pszeudomonaszok ily módon jól tolerálják a talaj magas NaCl-tartalmát, és gyökérkolonizáló tevékenységet képesek kifejteni a magas NaCl-tartalmú talajban is. A sókoncentráció növelésével kezdetben (a 0,2-0,4%-os tartományban) jelentosen növekedett a dehidrogenáz, kataláz, és ureáz enzimek aktivitása. A proteáz enzimek aktivitásmaximuma a 0,1-0,2% NaCl-koncentráció tartományba esett. A 0,4%-nál magasabb koncentrációkban a kontrollhoz hasonló mértékure csökkent mind a négy enzim aktivitása, és a baktériumok száma is. A foszfatáz- és a b-glükozidáz-tevékenység viszont a NaCl-dózis növelése következtében a koncentrációval arányosan, jelentosen csökkent a kontrollhoz viszonyítva. Feltételezésünk szerint az enzimaktivitások változását is a sókezelés hatására bekövetkezo mikrobióta összetételének megváltozása okozta.

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Cytology of Pseudo‐Self‐Compatibility in Ladino White Clover, Trifolium repens L. 1

Crop Science ◽

10.2135/cropsci1963.0011183x000300050019x ◽

1963 ◽

Vol 3 (5) ◽

pp. 430-433 ◽

Cited By ~ 3

Author(s):

Maimon M. Cohen ◽

R. C. Leffel

Keyword(s):

White Clover ◽

Trifolium Repens ◽

Self Compatibility ◽

Trifolium Repens L

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The Improved Phytoextraction of Heavy Metals and the Growth of Trifolium repens L.: The Role of K2HEDP and Plant Growth Regulators Alone and in Combination

Sustainability ◽

10.3390/su13052432 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2432

Author(s):

Anna Makarova ◽

Elena Nikulina ◽

Tatiana Avdeenkova ◽

Ksenia Pishaeva

Keyword(s):

Heavy Metals ◽

Plant Growth ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Trifolium Repens ◽

Growth And Development ◽

Water Infiltration ◽

Iron Chelates ◽

Iron Chelate ◽

Trifolium Repens L

Heavy metals are among the most widespread pollutants in soil. Phytoextraction technology is used to solve the problem of multi-metal-contaminated soil. The efficiency of this process can be increased by introducing various amendments. A soil amendment is any material added to a soil to improve its physical properties, such as water retention, permeability, water infiltration, drainage, aeration, and structure. Some chemical amendments for enhanced phytoextraction, such as amino polycarboxylates chelators, can be hazardous to the environment and perform poorly at pH > 8. The effect of the potassium salt of hydroxyethylidene diphosphonic acid (K2HEDP), plant growth regulators (PGRs), and iron chelate alone and in combination on the phytoextraction by Trifolium repens L. seedlings of Cd, Ni, and Cu was studied in this work. K2HEDP works in a wider pH range. The results of this study confirmed that amino polycarboxylate chelators, with the sodium salt of ethylene diamine tetraacetic acid (Na2EDTA) as an example, have a pronounced negative effect on the growth and development (organ mass) of Trifolium repens L. seedlings. K2HEDP, proposed by the authors instead of Na2EDTA, produced a pronounced positive effect on plant growth and development, which was further enhanced by the use of PGRs and with iron chelates. However, it should be noted that K2HEDP showed significantly lower efficiency in trials on the Trifolium repens L. seedlings. The highest was the efficiency of K2HEDP with PGRs and iron chelates for the phytoextraction of Cd.

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