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Topic: Panicle


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  Panicle and Spikelets
The inflorescence or panicle is borne on the uppermost internode of the culm.
The panicle base often appears as a hairlike ring and is used as a dividing point in measuring culm and panicle length.
The swellings at the panicle axis where the branches are borne are referred to as the panicle pulvinus.
www.knowledgebank.irri.org /RP/morph/Panicle_and_Spikelets.htm   (238 words)

  
 panicle
panicle An inflorescence, the main axis of which is branched; the branches bear loose racemose flower clusters.
Rice is a prominent crop plant with a panicle inflorescence.(From Glossary of Biotechnology for Food and Agriculture)
White panicle hydrangeas and rose-covered trellises surround him.
www.mongabay.com /igapo/biotech/panicle.html   (245 words)

  
 APSnet Feature: Panicle and Shoot Blight of Pistachio
Panicle and shoot blight was first discovered in a commercial orchard in the town of Durham, (Butte Co.) in the northern Sacramento Valley (Fig.
On one to several fruit in a panicle, some lesions enlarge quickly, the fruit turn fl, and infection can move through the peduncle to the rachis, and eventually to the shoot on which the fruit cluster is borne causing sunken elliptical cankers.
Cankers and retained panicle rachises are the major sources of inoculum during the winter and spring when rains occur and distribute conidia.
www.apsnet.org /online/feature/pistachio   (5011 words)

  
 IPM : Reports on Plant Diseases : Blast of Oats
An oat panicle is composed of numerous branches, each ending in a many-flowered spikelet in which only two flowers normally produce seed.
The first structure developing from the main axis of the panicle is a branch primordium (a first-order branch).
Therefore, the oat panicle is the oldest at the tip and youngest at the base.
www.ipm.uiuc.edu /diseases/series100/rpd117   (853 words)

  
 Biology 434 - Agrostology
The inflorescence is a narrow panicle and spikelets of prominent veins.
The inflorescence is a secund narrow panicle (sometimes this is not evident).
A perennial bunchgrass, inflorescence is a narrow panicle, spikelets
www.homepage.montana.edu /~mlavin/b434/lab5.htm   (524 words)

  
 STEEP - Integrated Management System for Sustained Seed Yield of Kentucky Bluegrass Without Burning
Panicles were collected from a 7 by 14 inch area and counted to determine panicle density in June 1999, 2000, and 2001.
C tiller panicles in early spring and panicles at harvest were 66 and 24% greater, respectively, in low residue (burned) areas of 'Nublue' compared to unburned areas in 2001.
In 2001, the number of C tiller and total panicles in early spring were variable among herbicide treatments in 'Nublue', while panicle number at harvest was 37% greater in plots treated with Roundup at 1.5 to 2.0 lb ai/A compared to the non-suppressed bluegrass control treatment.
pnwsteep.wsu.edu /annualreports/2001/sp3thill.htm   (1569 words)

  
 Ikisan - About Rice Growth stages   (Site not responding. Last check: 2007-10-19)
The reproductive growth phase is characterized by culm elongation (which increases plant height), decline in tiller number, emergence of the the last leaf, booting, heading, and flowering of the spikelets.
Panicle initiation is the stage about 25 days before heading when the panicle has grown to about 1 mm long and can be recognized visually or under magnification following stem dissection.
It takes 10-14 days for a rice crop to complete heading because there is variation in panicle exertion among tillers of the same plant and among plants in the same field.
www.ikisan.com /links/ap_ricegrowth.shtm   (539 words)

  
 Rice Journal.   (Site not responding. Last check: 2007-10-19)
In the past, panicle blighting was mainly attributed to nonliving factors including high nighttime temperature, water stress and toxic chemicals near the root zone.
Because a bacterial cause of panicle blight was new to rice in Louisiana, a research proposal to study the disease was submitted to the Louisiana Rice Research Board.
The panicle blight symptom was typical of that which is known to occur sporadically in Louisiana.
www.ricejournal.com /backissues/april2000/story3.asp   (931 words)

  
 Increase Rice Plant Yield by Getting More Sunlight to Leaves   (Site not responding. Last check: 2007-10-19)
The panicles are the parts of the rice plant that bear the spikelets, which in turn form the grain.
When yields are increased on a plant with panicles high in the canopy, the extra weight of the grains causes the plants to lodge, especially when it rains and the wind blows.
To test the theory that lowering panicle height would increase the amount of light reaching the rice plant's leaves and thus photosynthesis of rice, scientists used six approaches, from removing panicles completely from plants to simulate very low panicle heights, to the use of hormones to increase or decrease panicle height.
www.worldbank.org /html/cgiar/newsletter/May96/5panicle.html   (495 words)

  
 Panicle - Wikipedia, the free encyclopedia
A panicle is a compound raceme, a loose, much-branched indeterminate inflorescence with pedicellate flowers (and fruit) attached along the secondary branches (in other words, a branched cluster of flowers in which the branches are racemes).
Note that botanists use the term paniculate in two ways: "having a true panicle type of inflorescence" as well as "having an inflorescence with the form but not necessarily the structure of a panicle".
A corymb is similar to a panicle with the same branching structure, but with the lower flowers having longer stems, thus giving a flattish top superficially resembling an umbel.
en.wikipedia.org /wiki/Panicle   (242 words)

  
 MORPHOLOGY AND RICE GROWTH
The major structures of the panicle are the base, axis, primary and secondary branches, pedicel, rudimentary glumes, and the spikelets.
The panicle axis extends from the panicle base to the apex; it has 8-10 nodes at 2- to 4-cm intervals from which primary branches develop.
Panicle initiation is the stage about 25 d before heading when the panicle has grown to about 1 mm long and can be recognized visually or under magnification following stem dissection.
www.pakistaneconomist.com /issue2002/issue29/i&e4.htm   (2223 words)

  
 Rice Farming
Usually only one to five grains per panicle are infected, but up to 15 percent of the kernels may be infected on highly susceptible varieties.
Panicles are upright at maturity because the grain does not fill or panicles do not emerge from the flag leaf sheath.
The disease, caused by Pseudomonas glumae bacterium, is characterized by brown or straw-colored discoloration of florets on a panicle branch.
www.ricefarming.com /home/2002PestGuide/2001diseaseguide.asp   (830 words)

  
 UC IPM: UC Management Guidelines for Rice Blast on Rice
Lesions that occur on the leaf are usually diamond-shaped with a gray or white center and brown or reddish brown border and are 0.39 to 0.58 inch (1.0-1.5 cm) long and 0.12 - 0.2 inch (0.3-0.5 cm) wide.
Infections just below the panicle, usually at the neck node, cause a "neck rot" or "rotten neck blast" symptom that can be very injurious to the crop.
For example, there is a greater risk of neck and panicle blast infections occurring when growing one of the more susceptible cultivars and long periods of leaf wetness and warm night temperatures occur.
www.ipm.ucdavis.edu /PMG/r682100611.html   (1126 words)

  
 Hydrangea paniculata: Panicle Hydrangea
The upright, spreading branches often bend down with the weight of the blooms, and the brown, faded blooms should be removed in late September to keep the tree from looking unkempt.
Panicle Hydrangea can be used in a shrub border as a large sized accent shrub.
Panicle Hydrangea should be grown in full sun or partial shade on well-drained, moist, loamy soil.
edis.ifas.ufl.edu /ST298   (607 words)

  
 Organic fertilizer Statistics
The panicles produced from M-99 recommendation of 90-30-30 were comparable to all plants that were applied with CB-RSG.
Table 2 evidently shows that the pattern of significant differences among treatments in terms of panicle fresh weight were virtually the same as those indicated for panicle counts.
Alone or in combination with inorganic fertilizers, the panicle fresh weights are comparable with that of the M-99 (T2).
www.ecochem.com /t_testcbrsg_b.html   (324 words)

  
 Panicle Hydrangeas (Page 1)
Somehow this plant has lost favor in the South and I would guess it is because of the popularity of white-flowered crapemyrtles.
Panicle Hydrangeas are an exception to the typical thinking about sun exposure.
Panicle Hydrangea is typically trained as a single trunk small tree but can be a multi-stemmed large shrub.
www.aragriculture.org /horticulture/ornamentals/hydrangeas/Panicle_Hydrangea.htm   (178 words)

  
 P1624 Rice - Growth Stages of the Rice Plant
Panicle formation starts when all nodes have been formed and internodes begin to elongate.
The period from first heading when 10 to 20 percent of the panicles have emerged from the boot until maturity is usually 30 to 40 days.
The affected kernels may be throughout the panicle or only on a specific portion of the panicle.
msucares.com /pubs/publications/p1624.htm   (1087 words)

  
 IngentaConnect Sodium and potassium uptake of rice panicles as affected by salin...   (Site not responding. Last check: 2007-10-19)
IngentaConnect Sodium and potassium uptake of rice panicles as affected by salin...
Sodium and potassium uptake of panicles was studied for eight rice cultivars in field trials under irrigation with saline and fresh water in the hot dry season and the wet season 1994 at WARDA in Ndiaye, Senegal.
Panicle potassium concentration decreased with panicle development under both treatments in all cultivars, but to a lesser extent in salt treated susceptible cultivars.
www.ingentaconnect.com /content/klu/plso/1998/00000207/00000002/00197911   (376 words)

  
 Annual Grass and Perennial Weed Identification
Leaf blades pubescent on upper surface; ligule a fringe of hairs; inflorescence a cylindrical head (compact panicle) about 3–5 inches long, drooping from the base; spikelets crowded, subtended by numerous bristles (usually three to six) which arise from the base of the spikelet.
Leaf blades relatively hairless; ligule a fringe of hairs; inflorescence a cylindrical head (compact panicle) which is usually 3–4 inches long (but may be longer in robust green foxtail) and droops or nods from the tip; spikelets crowded, subtended by two to three bristles which arise from base of spikelet.
Leaves smooth and relatively hairless; ligule a fringe of hairs; stems zigzagged, nodes prominent; inflorescence a spreading panicle, culms often have several panicles arising from lower-leaf sheaths, these often not fully extended from boot; spikelets small, with three apparent glumes, the first short and blunt.
www.extension.umn.edu /distribution/cropsystems/DC1352.html   (749 words)

  
 Sorghum Kernel Weight: Growth Patterns from Different Positions within the Panicle -- Gambín and Borrás ...
panicle (Hamilton et al., 1982; Heiniger et al., 1993a,1993b).
Because anthesis of the basal section of the panicle is 4 to
Compensation in grain yield components in a panicle of rainfed sorghum.
crop.scijournals.org /cgi/content/full/45/2/553   (4205 words)

  
 ARS | Publication request: Yield Loss Estimates Associated with Panicle Diseases of Orchardgrass   (Site not responding. Last check: 2007-10-19)
Freezing injury of the immature panicle while still in the stem, and subsequent colonization by one or more bacteria, is believed to be the principal cause of the problem.
Stem rot was observed in 8 of the 10 fields, affecting 0.5 to 1.9% of the panicles (Table 1).
Collectively, the panicle diseases reduced seed yield as much as 14%, and choke was responsible for the greatest portion of the loss.
www.ars.usda.gov /research/publications/Publications.htm?seq_no_115=175666   (523 words)

  
 [No title]
The vegetative and reproductive growth stages overlap and several panicle developmental events are synchronous to specific Vstages.
This leads to panicles remaining green longer than normal and the failure of top of the panicle to turn down due to the weight of the filled grain, thus the name "straight head" referring to the unbending panicle.
To eliminate the possibility that the developing panicle is branching (R1) during the time the soil is dry.
www.uark.edu /misc/aflsciv/cses400/rcd.htm   (1322 words)

  
 BioMed Central | Full text | Identification and mapping of yield and yield related QTLs from an Indian accession of ...
The average grain yield of the testcross families was 6.08 t/ha, with the range varying from 3.90 to 9.45 t/ha, while yield per plant ranged from 7.5 to 36.0 g with an average of 19.5 g.
The QTL for panicle length, pl2.1, is mapped to the same region under same name in a study involving O.
All the three QTLs for panicle length, pl2.1, pl5.1 and pl9.1, were trait enhancing and overlapped with the regions identified earlier for the same trait (Table 6).
www.biomedcentral.com /1471-2156/6/33   (6599 words)

  
 Panicle initiation and flowering date   (Site not responding. Last check: 2007-10-19)
Flowering date is predicted on the basis of panicle initiation.
Panicle initiation begins at maximum tillering in all rice cultivars.
The young panicle (panicle primordium) becomes visible (with a magnifying lens) within
www.knowledgebank.irri.org /hybridriceseed/Panicle_initiation_and_flowering_date.htm   (83 words)

  
 Rice Blast: A New Disease in California
Leaf lesions are usually diamond shaped with a gray or white center and brown or reddish brown border and are 1.0-1.5 cm long and 0.3-0.5 cm wide.
Infections just below the panicle, usually at the neck node, cause a typical "neck rot" or "rotten neck blast" symptom that can be very injurious to the crop.
Lesions on panicle branches and glumes were also observed, but less frequently.
www.agronomy.ucdavis.edu /uccerice/afs/agfs0297.htm   (1325 words)

  
 DESCRIBING MANGO
Leaf thickness and color of mature leaves are extremely variable within a variety due to vigor of the tree growth caused by external factors such as soil moisture, fertility and climate.
(1) Conical Panicles: The length of the main axis of the panicle greatly exceeds the width (spread).
(2) Pyramidal Panicle: The width (spread) of the base of the panicle is roughly equal to the length.
home.att.net /~oc_crfg/mango-description.htm   (1111 words)

  
 Rice CRC ...Panicle Position
Rice grains are contained in spikelets or small branches on the flowering stem known as the panicle.
Grains are either in the superior or in the inferior position on the panicle.
Superior grains are on the primary branches of the panicle and inferior grains are on the secondary branches that extend from under the primary branches.
www.agric.nsw.gov.au /reader/rice-science-quality/panicle-position.htm   (185 words)

  
 Rice Response to Planting Date Differs at Two Locations in Louisiana
Research was conducted from 1995 through 1997 at two locations in Louisiana to determine the number of days from seedling emergence to 50% panicle emergence and rough rice grain yield of the cultivars Bengal, Cypress, Jodon, and Kaybonnet when drill seeded at five dates ranging from late March through early June.
Data for Julian days required for 50% panicle emergence and rough rice grain yield were subjected to analysis of variance using a five (planting date) by four (cultivar) factorial treatment arrangement for each location.
Julian days from seedling emergence to 50% panicle emergence decreased as seeding was delayed from late March (82 days of the year) through early to mid-May (124 days of the year) at both locations (Fig.
www.plantmanagementnetwork.org /pub/cm/research/2004/rice   (3251 words)

  
 Harris: Leaf Form and Panicle Height . . .
Abstract The variability of leaf form and panicle height of Rumex acetosella L.
Seasonal changes of leaf form and environmental modifications of leaf form were related to changes in the proportion of vegetative and cauline leaves and allometric size effects on relative dimensions of mature leaves.
Panicle height and leaf size were markedly modified by environmental factors and were of little value for taxonomic determinations of field samples.
www.rsnz.org /publish/nzjb/1973/6.php   (253 words)

  
 Lychee Flower Panicle Development
When a lychee tree flowers the flower panicle emerges 4-6 weeks after initiation has taken place as a showy multi flowered cluster, known as a panicle, on the end of branches (terminal inflorescence).
A fully developed panicle consists of a main stem or spine known as a rachis with lateral (axial) branche.
A panicle can be 1 to 1 ½ feet in length or more long and have as many as 3000 flowers, although only a small percentage of these are ever pollinated (100 - 200).
www.lycheesonline.com /PanicleDevelopment.cfm   (320 words)

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