Reproductive tillers in cut tall fescue swards: differences according to sward age and fertilizer nitrogen application, and relationships with the local dynamics of the sward

Lafarge, Michel

doi:10.1111/j.1365-2494.2006.00525.x

Cited by 13 publications

(15 citation statements)

References 32 publications

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“…The combined proportion of ELONG and GEN tillers (51–69% on the last two sampling times) in the regrowth of our study is therefore comparable to that reported by Bélanger and McQueen (1998) for nonlimiting N conditions. The proportion of GEN tillers in the primary growth (10–24%) of tall fescue is consistent with values reported from other studies (5–15%) (Lafarge, 2006).…”

Section: Resultssupporting

confidence: 91%

“…The proportion of GEN tillers can be affected by N fertilization. Nitrogen fertilization increased the proportion of GEN tillers in the spring growth of tall fescue (Lafarge, 2006). In the regrowth of timothy, the proportion of GEN tillers increased from 10% with no N applied to 51% under nonlimiting N conditions (Bélanger and McQueen, 1998).…”

Section: Resultsmentioning

confidence: 99%

“…To our knowledge, there are no reports of comparison of tall fescue and timothy in the same study for tillering characteristics. In a study conducted in the United States, the tiller density of tall fescue was around 2500 tillers m −2 (Zarrough et al, 1983) while in France, tiller densities between 2500 and 5000 tillers m −2 (Lafarge, 2006) were reported. These findings are in line with our results.…”

Section: Resultsmentioning

confidence: 99%

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Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

et al. 2012

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Herbage dry matter (DM) yield of grasses is a function of the density and size of vegetative (VEG), generative (GEN), and elongating vegetative (ELONG) tillers. We determined the contribution of these tbree tiller types to DM yield accumulation along with their main morphological characteristics on three sampling dates during each of the primary growth and the regrowth of field-grown swards of timothy (Phleum pratense L.) and tall fescue (Festuca arundinacea Scbreb.). Our results provide the first quantitative characterization of ELONG tillers, which contributed to timothy DM yield by up to 28% in primary growth and 58% in regrowth. In tall fescue, VEG tillers were dominant in primary growth and regrowth (74 to 100% of DM yield). The GEN tillers were dominant (67 to 74% of DM yield) in the primary growth of timothy while in the regrowth, VEG tillers were dominant early (84% of DM yield) but ELONG tillers represented 58% of DM yield later on. Timothy and tall fescue had similar rates of DM accumulation. The greater DM yield on all sampling times of the regrowth of tall fescue confirms a greater growth before the first sampling, most likely due to the greater proportion of VEG tillers. The GEN tillers were large with low leaf to weight ratio (LWR) and proportion of attached senesced material whereas VEG tillers were small with high LWR and large proportion of attached senesced material. The ELONG tillers were intermediate in size and LWR but they had a low proportion of attached senesced material.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

et al. 2012

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“…Plant carbohydrate status is well known to affect tillering, therefore indices of carbohydrate supply/demand have been developed to account for how this factor modulates tillering under field conditions (Kirby et al . ; Lafarge ; Luquet et al . ; Kim et al .…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic leaf area modulates tiller bud outgrowth in sorghum

Kebrom

Mullet

2015

Plant Cell & Environment

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Shoot branches or tillers develop from axillary buds. The dormancy versus outgrowth fates of buds depends on genetic, environmental and hormonal signals. Defoliation inhibits bud outgrowth indicating the role of leaf-derived metabolic factors such as sucrose in bud outgrowth. In this study, the sensitivity of bud outgrowth to selective defoliation was investigated. At 6 d after planting (6 DAP), the first two leaves of sorghum were fully expanded and the third was partially emerged. Therefore, the leaves were selectively defoliated at 6 DAP and the length of the bud in the first leaf axil was measured at 8 DAP. Bud outgrowth was inhibited by defoliation of only 2 cm from the tip of the second leaf blade. The expression of dormancy and sucrose-starvation marker genes was up-regulated and cell cycle and sucrose-inducible genes was down-regulated during the first 24 h postdefoliation of the second leaf. At 48 h, the expression of these genes was similar to controls as the defoliated plant recovers. Our results demonstrate that small changes in photosynthetic leaf area affect the propensity of tiller buds for outgrowth. Therefore, variation in leaf area and photosynthetic activity should be included when integrating sucrose into models of shoot branching.

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“…Seedheads/m 2 averaged 117 and 475 in 2003 and 2004, respectively. This compares to a range of 300 to 600 in France (9), 388 for ‘Fawn’ grown in Oregon (19), and 180 seedheads/m 2 for winter clipped ‘AU Triumph’ in Alabama (15).…”

Section: Winter Grazing Effects On Seed Yield Components and Germinationmentioning

confidence: 88%

Winter Grazing can be Beneficial to Tall Fescue Seed Production in Oklahoma

Santillano-Cázares¹,

Redfearn²,

Caddel³

et al. 2008

Forage & Grazinglands

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There is little information available about the effects of winter grazing on tall fescue seed production in Oklahoma and north Texas. Our objective was to determine the effects of winter grazing on tall fescue seed yield, seed yield components, and seed germination in this region. Four tall fescue entries were either grazed or remained un‐grazed during two growing seasons (2002‐2003 and 2003‐2004) near Burneyville, OK. Winter grazing lead to seed yield increases of as much as 380% under drought conditions in 2002‐2003 but did not affect seed yield in 2003‐2004. Winter grazing resulted in more seedheads/m2 in both growing seasons, and greater seed weight, seeds/m2, and germination in 2003‐2004. Winter grazing could be a viable component of tall fescue seed production systems in Oklahoma and north Texas, although drought can severely limit yields in some years.

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Reproductive tillers in cut tall fescue swards: differences according to sward age and fertilizer nitrogen application, and relationships with the local dynamics of the sward

Cited by 13 publications

References 32 publications

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

Photosynthetic leaf area modulates tiller bud outgrowth in sorghum

Winter Grazing can be Beneficial to Tall Fescue Seed Production in Oklahoma

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