Importance of sepals in fruit and seed development in linseed (Linum usitatissimum L.)

Tomar, Deepali; Deshmukh, P. S.; Sinha, S. K.

doi:10.1007/bf00038942

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The positive correlation between leaf area duration and reproductive biomass at harvest (Figure 5), together with the lack of re-allocation of biomass from the stems in that stage (Figure 1), suggested that almost all the grain filling depended on the carbohydrates produced by the current photosynthesis in leaves and other green organs such as sepals (Tomar, Deshmukh, and Sinha 1979). The correlation between leaf area duration and reproductive biomass was stronger for the oilseed cultivar than for the textile one.…”

Section: Discussionmentioning

confidence: 88%

Comparative Growth of Oilseed and Textile Flax under Different Nitrogen Supplies

Giménez

Sorlino

Trápani

2007

Communications in Soil Science and Plant Analysis

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The objective of this work was to compare and characterize the response to nitrogen (N) supply of a textile and an oilseed cultivar of flax (Linum usitatissimum L.). The dynamics of growth, biomass partitioning, growth rates, and leaf area evolution and duration of the cultivars Omega (oilseed) and Diane (textile) were compared under three rates of N supply. Plants were grown in pots in the field with nil (N1), 2.5 (N2), and 5 g N per pot (N3); N2 and N3 doses were divided into five applications. Shoot biomass of N2 and N3 treatments was similar in both cultivars and significantly higher than in N1. Partitioning of biomass was unaffected by N treatment but showed contrasting patterns between cultivars. The oilseed cultivar produced 30 -42% more reproductive biomass and 18-30% less stem biomass than its textile counterpart. Differences between cultivars in these traits increased with increasing N rate. Maximum growth rates per plant concentrated around 15728Cd after sowing (fructification). Faster leaf senescence after flowering contributed to the lower leaf area and leaf biomass of the textile cultivar.The availability of N at different specific moments of the plant cycle would be useful to improve the growth of organs of economic interest. Results can also provide useful information to future nutrition models and breeding programs in textile and oilseed flax.

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Section: Discussionmentioning

confidence: 88%

Comparative Growth of Oilseed and Textile Flax under Different Nitrogen Supplies

Giménez

Sorlino

Trápani

2007

Communications in Soil Science and Plant Analysis

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“…29) (this study), and their margins are decurrent on the floral base or floral cup in some Rhizophoraceae (especially Rhizophoreae), some Erythroxylaceae, in Ctenolophonaceae, Caryocaraceae and Reinwardtia (Linaceae) (this study). Sepals are caducous in Irvingiaceae but persistent in Erythroxylaceae (Hallier, 1921) and Linaceae (Addicott, 1977; Tomar, Desmukh & Sinha, 1979; Uno, 1984). As is common in eudicots, sepals of all six families often have three vascular traces (this study; Rao, 1965; Narayana & Rao, 1978d; Juncosa, 1986); and there are synlaterals (this study; for Rhizophoraceae, see Saunders, 1939).…”

Section: Discussionmentioning

confidence: 99%

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Matthews

Endress

2011

Botanical Journal of the Linnean Society

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Within the rosid order Malpighiales, Rhizophoraceae and Erythroxylaceae (1) are strongly supported as sisters in molecular phylogenetic studies and possibly form a clade with either Ctenolophonaceae (2) or with Linaceae, Irvingiaceae and Caryocaraceae (less well supported) (3). In order to assess the validity of these relationships from a floral structural point of view, these families are comparatively studied for the first time in terms of their floral morphology, anatomy and histology. Overall floral structure reflects the molecular results quite well and Rhizophoraceae and Erythroxylaceae are well supported as closely related. Ctenolophonaceae share some unusual floral features (potential synapomorphies) with Rhizophoraceae and Erythroxylaceae. In contrast, Linaceae, Irvingiaceae and Caryocaraceae are not clearly supported as a clade, or as closely related to Rhizophoraceae and Erythroxylaceae, as their shared features are probably mainly symplesiomorphies at the level of Malpighiales or a (still undefined) larger subclade of Malpighales, rather than synapomorphies. Rhizophoraceae and Erythroxylaceae share (among other features) conduplicate petals enwrapping stamens in bud, antepetalous stamens longer than antesepalous ones, a nectariferous androecial tube with attachment of the two stamen whorls at different positions: one whorl on the rim, the other below the rim of the tube, the ovary shortly and abruptly dorsally bulged and the presence of a layer of idioblasts (laticifers?) in the sepals and ovaries. Ctenolophonaceae share with Rhizophoraceae and/or Erythroxylaceae (among other features) sepals with less than three vascular traces, a short androgynophore, an ovary septum thin and severed or completely disintegrating during development, leading to a developmentally secondarily unilocular ovary, a zigzag-shaped micropyle and seeds with an aril.

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“…A small sampling of crop plants shown to have significant photosynthetic contributions from PRS include alfalfa (Wang et al 2016); cotton (Hu et al 2012; Hu et al 2014); cucumber (Marcelis et al 1995); grapes (Lebon et al 2005; Vaillant-Gaveau et al 2011); tomato (Hetherington et al 1998; Smillie et al 1999); and persimmon (Yonemori et al 1996). Sepal removal from flax ( Linum usitatissimum L.) reduced fruit yield by up to 88% (Deshmikh et al 1976; Tomar et al 1979).…”

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confidence: 99%

Calyx Variability, Plasticity, and Their Relationships to Seed Weight and Inflorescence Structure in Phacelia Subsect. Humiles (Hydrophyllaceae)

Lee

2024

Madroño

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Phacelia (Hydrophyllaceae) Juss. is a primarily western North American genus of over 200 annual and perennial species. Historically, calyces in Phacelia subsect. Humiles have provided important taxonomic characters with published descriptions giving mature calyx sizes as ranges rather than a specific number, and with little attention paid to the intra-or interspecific biological significance of this variation. This paper tests the hypothesis that Phacelia sepals are phenotypically plastic organs and that their post-accrescent size in Phacelia subsect. Humiles is related to seed production in associated fruits. Examination of ten taxa within Phacelia subsect. Humiles revealed that calyx size variation within a species was positively correlated with seed weight per capsule for nine of the ten taxa examined. Experimental data showed the correlation was not due to allometry. In defoliation experiments plants grown with all leaves removed post-germination were able to flower and produce seed solely through cotyledon, stem, and calyx photosynthesis, with the sepals expanding in size well beyond normal parameters. This and other data demonstrated that the sepals have developmental plasticity, are important photosynthetic organs, that the seed-weight/sepal-size correlation represents a functionally important source-sink relationship, and that pedicel length and inflorescence density are frequently related to calyx morphological characteristics.

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Importance of sepals in fruit and seed development in linseed (Linum usitatissimum L.)

Cited by 6 publications

References 5 publications

Comparative Growth of Oilseed and Textile Flax under Different Nitrogen Supplies

Comparative Growth of Oilseed and Textile Flax under Different Nitrogen Supplies

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Calyx Variability, Plasticity, and Their Relationships to Seed Weight and Inflorescence Structure in Phacelia Subsect. Humiles (Hydrophyllaceae)

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