Source-sink ratio in barley (Hordeum vulgare L.) during grain filling: effects on senescence and grain protein concentration

Dreccer, M. Fernanda; Grashoff, C.; Rabbinge, R.

doi:10.1016/s0378-4290(96)01002-7

Cited by 70 publications

(25 citation statements)

References 31 publications

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“…We found barley to have significantly higher MWC and M C PM than wheat. The difference in MWC may well explain the commonly reported higher potential grain weight of barley respect to wheat (Dreccer et al, 1997;Abeledo et al, 2002Abeledo et al, , 2003Calderini et al, 2000;Ehdaie et al, 2008). The fact that barley reached PM at higher M C than wheat is relevant in the context of this study as it implies that barley may be sprayed with a desiccant herbicide earlier than wheat, further enlarging the difference between both cereals in field release for sowing soybeans.…”

Section: Discussionmentioning

confidence: 64%

“…Grain growth could be considered as controlled by either the supply of photo-assimilates (source limitation) or the capacity of the grains to accumulate available carbohydrates (sink limitation). Numerous experiments have been reported in which the supply of assimilate per grain was modified, suggesting a sink limitation for both, wheat and barley, and sometimes a co-limitation in wheat (Slafer and Savin, 1994;Miralles and Slafer, 1995;Dreccer et al, 1997;Kruk et al, 1997;Bingham et al, 2007a;Serrago et al, 2011). However, under relatively dry environments, grain filling appears to be under stronger sink limitation in barley than in wheat (Josephides, 1993;López-Castañeda and Richards, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Comparative behavior of wheat and barley associated with field release and grain weight determination

Prado

Gallardo

Serrago

et al. 2013

Field Crops Research

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a b s t r a c t Double-cropping using the wheat-soybean sequence is a common practice in Argentina to promote the intensification of crops within rotations. However, the late release of the fields by a delayed harvest time in wheat determines soybean yield penalizations. In this context, barley could represent a better option than wheat preceding soybean in the crop rotation since there is some evidence that finishes its cycle earlier than wheat. However, it is not clear which period of barley shortens crop cycle allowing an earlier field release than wheat. The objectives of this study were to compare wheat and barley in terms of (i) field release and (ii) grain weight determination through the analysis of their physiological mechanisms. Field experiments during two consecutive growing seasons testing five different environments (three sowing dates in 2007 and two in 2008) were carried out to analyze the duration of different ontogenic periods and the attributes (dry matter and water dynamics) determining grain weight during the grainfilling period in wheat and barley. Early flowering time was the main cause of the early field release by barley as the grain filling and drying period were similar in both species. A strong relationship was found between dry matter and water dynamics in both species. Barley reached a higher maximum water content than wheat and also achieved physiological maturity with higher moisture concentration than wheat (48% and 39%, respectively). Barley showed a slight increase in grain weight, respect to wheat, due to a source:sink ratio enhancement (4% and 9% for wheat and barley, respectively). These data show an opposite response to that of Mediterranean, Australian and UK environments, where barley was under stronger sink limitation than wheat during the grain-filling period.

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Section: Discussionmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Comparative behavior of wheat and barley associated with field release and grain weight determination

Prado

Gallardo

Serrago

et al. 2013

Field Crops Research

View full text Add to dashboard Cite

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“…This is in line with the fact that grain growth is frequently sink-limited both in wheat (Jenner, 1979;Savin and Slafer, 1991;Slafer and Savin, 1994;Miralles and Slafer, 1995;Kruk et al, 1997;Borrás et al, 2004;Calderini et al, 2006) and barley (Dreccer et al, 1997;Savin et al, 2006;Bingham et al, 2007). This is seemingly true even in environments characterized by terminal stress (Cartelle et al, 2006;Pedro et al, 2011).…”

Section: Introductionmentioning

confidence: 55%

Understanding grain yield responses to source–sink ratios during grain filling in wheat and barley under contrasting environments

Serrago

Alzueta

Savin

et al. 2013

Field Crops Research

181

138

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a b s t r a c tA better understanding of the effects of different source-sink ratio during the grain filling period on grain growth may be relevant in order to further increase cereal grain yield. The main objective of the present work was to determine the effect of different manipulations of the source-sink ratios in wheat and barley grown at four different environmental conditions on responsiveness of sinks (grain growth and yield) and sources (spike photosynthesis and water soluble carbohydrates in the stems). Four treatments were imposed 7 days after anthesis in two contrasting locations with low-and highinputs conditions in wheat (cv. Soissons) and barley (cv. Sunrise): they were a control, a treatment removing all the spikelets from the upper half of the spikes (T S ), and shadings decreasing incident radiation by 75% on the whole canopy (S W ) or only on the leaves (having the top area of the meshes individual holes for each spike to be exposed to solar radiation, S L ). As expected grain yield was closely related to grain number per m 2 . Average grain weight was reduced by shading treatments far more markedly in S w than in S L . Interestingly, significant amounts of water soluble carbohydrates in the stems remained at maturity in S L and S w treatments and spike photosynthesis in S L was consistently higher than in the unshaded controls in both species. These results may be an indication that wheat and barley are not source-limited during grain filling and that only when subjected to an extremely severe stress, grain size would be reduced due to lack of enough assimilates available to fill them.

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“…Grains are regarded as the ultimate sink in cereals during the grainfi lling stage, whereas other organs change over time from the sink to source, or vice versa, to support grain growth (Dreccer et al, 1997). Most carbohydrates are provided by concurrent photoassimilation, but the majority of grain N is remobilized from the vegetative organs, where it is stored before anthesis (Van Sanford and MacKown, 1987).…”

mentioning

confidence: 99%

Grain Nitrogen Concentration in Wheat Grown under Intensive Organic Manure Application on Andosols in Central Japan

Kato

2012

Plant Production Science

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Source-sink ratio in barley (Hordeum vulgare L.) during grain filling: effects on senescence and grain protein concentration

Cited by 70 publications

References 31 publications

Comparative behavior of wheat and barley associated with field release and grain weight determination

Comparative behavior of wheat and barley associated with field release and grain weight determination

Understanding grain yield responses to source–sink ratios during grain filling in wheat and barley under contrasting environments

Grain Nitrogen Concentration in Wheat Grown under Intensive Organic Manure Application on Andosols in Central Japan

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