Relation entre quelques caractères morphologiques et la sensibilité à la verse en végétation du maïs (Zea mays L)

Pellerin, Sylvain; Trendel, Roland; Duparque, Annie; Blatz, A; Petit, Barbara

doi:10.1051/agro:19900601

Cited by 33 publications

(10 citation statements)

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“…Although yield differences were not significant in this field experiment, ridging may improve yield potential under conditions where lodging and rootworm damage limit yields. Pellerin et al (1990) examined 12 maize hybrids with different root morphologies, and confirmed that development of FRat aboveground nodes (Nodes 6, 7, 8, and/or 9) is important in lodging resistance. During a severe lodging event, maize hybrids with roots at Node 6 had very little lodging, while hybrids with roots only up to Node 4 showed severe lodging.…”

Section: Field Experimentsmentioning

confidence: 75%

Maize Nodal Root Response to Soil Ridging and Three Tillage Systems

Thomas

Kaspar²

1995

Agronomy Journal

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A greater understanding of maize (Zea mays L.) nodal root response to soil ridging and tillage systems is needed to maximize the benefits of ridge‐till and other conservation tillage systems. Field (1992 and 1993 near Marshalltown, IA) and greenhouse (two studies with two trials each) experiments were conducted to examine the effect of soil ridging, height of ridging, and three tillage systems (no‐till, ridge‐till, and chisel‐plow) on the number and stem node position of maize nodal roots and on internode length. Field plants were ridged during cultivation. In the greenhouse, ridging was simulated by using polyvinyl chloride rings to hold soil around the base of plants. Numbers of nodal roots, numbers of nodes developing functional roots, internode lengths, shoot dry weights, and grain yields (field study) were determined. In one greenhouse experiment, unridged plants developed an average of 38.4 functional nodal roots, while ridged plants developed 50.0, an increase of 30%. In the same greenhouse experiment, ridging significantly increased lengths of Internodes 6 and 7, which were covered with soil during ridging. Average length of Internode 7 increased from 64 mm to 101 mm with ridging. Increasing ridge height increased internode length and number of nodal roots in the controlled greenhouse experiments, but not in the field. In field experiments, ridge‐till caused development of significantly more functional nodal roots as compared with no‐till (1992 and 1993) and chisel‐plow (1992). Plants from no‐tiil developed 53.1 and 46.0 functional nodal roots in 1992 and 1993, respectively, while plants from ridgetill developed 58.7 and 49.1 roots. Shoot dry weight and grain yield were not affected by ridging or tillage treatments in the greenhouse or field.

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Section: Field Experimentsmentioning

confidence: 75%

Maize Nodal Root Response to Soil Ridging and Three Tillage Systems

Thomas

Kaspar²

1995

Agronomy Journal

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“…Regarding whole plant yield, the effects of GCA (general combining ability) were preponderant, and the ratio between the variance of SCA (specific combining ability) and that of GCA was smaller than for grain yield (eg, Dhillon et al, 1990a;Geiger et al, 1992;Barrière et al, 1993a (Hallauer, 1990 (Dubreuil et al, 1996), and pointing out the complementary management of lines to be used as progenitors in pedigree breeding. This could further be improved if these techniques were coupled with statistical methods allowing the identification of the source of genes to be used in reciprocal improvement of lines (Dudley, 1992) Variation in the anchoring quality of the roots was related to the variation in the susceptibility to root lodging of hybrids (Andrew and Solanki, 1966;Musich et al;1965;Pellerin et al, 1990;Hébert et al, 1990-92). The genetic variation regarding resistance to lodging occurred with a large variation of all traits related to the form and structure of the root system.…”

Section: Silage Maize Yield and Earlinessmentioning

confidence: 99%

Relevant traits, genetic variation and breeding strategies in early silage maize

et al. 1997

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“…On maize, nodal roots of upper phytomers also play an important role in stem stability (Pellerin et al, 1990). On maize, nodal roots of upper phytomers also play an important role in stem stability (Pellerin et al, 1990).…”

Section: E M O T E S -M a I N A R D And Pellerinmentioning

confidence: 99%

Effect of mutual shading on the emergence of nodal roots and the root/shoot ratio of maize

Demotes-Mainard

Pellerin

1992

Plant Soil

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The effect of mutual shading on the root/shoot ratio and on the number of nodal roots of maize was studied. Plants of two varieties (Dea and LG2281) were grown in individual pots of 9 L, at three plant densities: 7.5, 11 and 15 plants m -2. A control experiment was carried out in order to study if root growth was affected by the small size of the pots. Maize plants (cv Dea) were grown at a low plant density (7.5 plants m -2) in pots of two different volumes (9 and 25 L respectively). In both experiments plants were watered every two hours with a nutrient solution. Some plants were sampled at five dates in the main experiment and the following data were recorded: foliar stage; root, stem and leaf dry weight; number of root primordia and number of emerged roots per phytomer. The final sampling date occurred at silking.Results of the control experiment showed that the root biomass was lower in small pots but the number of nodal roots per phytomer was not affected.Results of the main experiment showed that the total plant biomass and the root/shoot ratio were lower at high plant density. The number of emerged roots was strongly reduced on the upper phytomer (Ps). This reduction was mainly due to a lower percentage of root primordia which elongated. A proposed interpretation is that the number of roots which emerge on upper phytomers is controlled by carbohydrate availability.

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Relation entre quelques caractères morphologiques et la sensibilité à la verse en végétation du maïs (Zea mays L)

Abstract: fig 5). These results emphasize the role of the roots of the upper internodes on stem stability. The date of appearance of these roots, and their mechanical properties, must also be taken into account.

Cited by 33 publications

References 0 publications

Maize Nodal Root Response to Soil Ridging and Three Tillage Systems

Maize Nodal Root Response to Soil Ridging and Three Tillage Systems

Relevant traits, genetic variation and breeding strategies in early silage maize

Effect of mutual shading on the emergence of nodal roots and the root/shoot ratio of maize

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