The Growing Point of Fall‐Sown Wheat: A Useful Measure of Physiologic Development
            <sup>1</sup>

George, Donald A. R.

doi:10.2135/cropsci1982.0011183x002200020009x

Cited by 20 publications

(15 citation statements)

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“…The slower early development of Lignee 131, compared with the Syrian landraces, reflects the higher vernalization requirement of Lignee 131 (ICARDA, 1989) . The increased cold tolerance of entries with a slow early development is related to a later induction and initiation of florals and an extended positioning of the apex below the soil surface (George, 1982 ;Kirby et al ., 1985a) . An additional advantage of this submerged apex position is a better survival of green stage grazing (Rhodes, 1975), a common farming practice in the dry areas of east and north east Syria (Nordblom, 1983) .…”

Section: Discussionmentioning

confidence: 99%

Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Oosterom

Acevedo

1992

Euphytica

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Differences in development of the apex may be the reason for cultivar differences in adaptation of barley to terminal drought in Mediterranean environments . The present study was conducted to identify apical development patterns of barley adapted to terminal drought stressed Mediterranean environments and to determine plant characteristics which can be used as criteria to select for an adapted development . Thirtyfive two-rowed barley (Hordeum vulgare L.) entries were grown at two sites in northern Syria (Tel Hadya and Breda) in 1988/89 . Four apical development patterns were observed : a slow or fast vegetative development, depending on the vernalization requirement, combined with a slow or fast generative development, depending on the daylength response of the crop . Early heading was related to fast generative development . Leaf appearance rates on the main shoot were constant during a major part of the pre-anthesis period, but significant differences were observed among development patterns . Genotypic differences in main shoot tiller number were associated with differences in the onset of tiller appearance and not with differences in tiller appearance rate or final leaf number on the main shoot . Since vernalization requirements and daylength responses are largely independent of terminal drought stress, selection for an adapted phenology can be done in favourable environments . Morphological traits related to these responses (winter growth habit, cold tolerance, plant colour, growth vigour, heading date) can be used as criteria for selection for adaptation to low-rainfall Mediterranean environments .

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Section: Discussionmentioning

confidence: 99%

Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Oosterom

Acevedo

1992

Euphytica

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“…Sous temperature constante de 4oc, les plantes de tous les cultivars manifestaient au d6part une acclimataion rapide aux basses temperatures' ce rythme d'adaptation ralentissait ensuite pour aboutir finalement d une chute de I'acclimation, ce qui produisait une relation curvilineaire entre la tol6rance aux basses temperatures et la dur6e de I'acclimatation. Un rapport 6troii 6tait observe entre le temps requis pour obtenir une compldte vemalisation et le d6but de (Andrews 1960a;Roberts 1979;Gusta et al 1982) Limin and Fowler 1985). Acquired low-temperature tolerance is rapidly lost when cereals are exposed to crown temperatures above 10oC (Gusa et al 1982).…”

Section: Wheat Ryeunclassified

“…Completion of vemalization has often been suggested as the primary reason for the overwinter decline in iowtemperature tolerance of cereals maintained below lOoC (Andrews 1960a;Marshall 1969;Koch 1973;yncentl973;George 1982;Roberts 1990 For personal use only. and 49 d at 4"C to achieve vernalization saturation (Fig.…”

Section: Wheat Ryementioning

confidence: 99%

Relationship between low-temperature tolerance and vernalization response in wheat and rye

Fowler¹,

Limin²,

Wang³

et al. 1996

Can. J. Plant Sci.

124

100

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“…A scale ranging from 1 to 12 (George 1982) was used to determine developmental stages (Table 2). At each sampling, six plants per cultivar were dissected right after sampling and thawing.…”

Section: Evaluation Of Generative Inductionmentioning

confidence: 99%

“…Plants were Table 2. Apex developmental stages according to George (1982) The growing point is slightly elongated, emerging from surrounding young leaves. Slight, but distinct ridges (leaf primordia) can be seen below the apex 3…”

Section: Evaluation Of Generative Inductionmentioning

confidence: 99%

The relationship between frost tolerance and generative induction in winter wheat (Triticum aestivum L.) under field conditions

Bergjord¹,

Bakken²,

Skjelvåg³

2009

Can. J. Plant Sci.

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. 2009. The relationship between frost tolerance and generative induction in winter wheat (Triticum aestivum L.) under field conditions. Can. J. Plant Sci. 89: 1031Á1039. The quantitative nature of the vernalization and photoperiod requirements and the interference of plant age with these mechanisms complicate predictions of generative induction and its relation to frost tolerance. This study was designed to dissect further the course of development towards full generative induction and to time the stages in frost tolerance. Two cultivars of winter wheat were regularly sampled from fields at four sites during three winters. The apex stage of development was observed at time of sampling and after 3 subsequent weeks of growth at 188C, under either short or long days. Level of frost tolerance at sampling was also recorded. No visible change in apex appearance was found at time of sampling, but readiness of plants to initiate generative development was enhanced. Vernalization by low temperatures alone was not enough to induce the plants into generative development or initiate loss of frost tolerance. Short day conditions after sampling delayed the appearance of double ridges by 6Á9 wk as compared with long day conditions. The timing of maximum frost tolerance and its subsequent decrease indicated that generative induction under the short day conditions prevailing in field occurred about 1 mo after vernalization saturation.

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The Growing Point of Fall‐Sown Wheat: A Useful Measure of Physiologic Development ¹

Cited by 20 publications

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Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Relationship between low-temperature tolerance and vernalization response in wheat and rye

The relationship between frost tolerance and generative induction in winter wheat (Triticum aestivum L.) under field conditions

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The Growing Point of Fall‐Sown Wheat: A Useful Measure of Physiologic Development 1

Cited by 20 publications

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Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Adaptation of barley (Hordeum vulgare L.) to harsh Mediterranean environments

Relationship between low-temperature tolerance and vernalization response in wheat and rye

The relationship between frost tolerance and generative induction in winter wheat (Triticum aestivum L.) under field conditions

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The Growing Point of Fall‐Sown Wheat: A Useful Measure of Physiologic Development ¹