Functional dynamics of the nitrogen balance of sorghum. II. Grain filling period

Oosterom, Erik van; Chapman, Scott C.; Borrell, Andrew; Broad, Ian; Hammer, Graeme

doi:10.1016/j.fcr.2009.09.019

Cited by 95 publications

(74 citation statements)

References 49 publications

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“…Leaf number variations across genotypes were attributed to genotypic differences. Chlorophyll content index increased and plateaued after floral initiation with peak CCI measurements ranging between 50 and 61; these results were similar to observations by Van Oosterom et al (2010). Stomatal conductance in landraces was less sensitive to differences in TAW compared to the OPV and hybrid genotypes.…”

Section: Final Emergence and Crop Establishmentsupporting

confidence: 79%

Water use of sorghum (<i>Sorghum bicolor</i> L. Moench) in response to varying planting dates evaluated under rainfed conditions

Hadebe¹,

Mabhaudhi²,

Modi³

2017

WSA

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Section: Final Emergence and Crop Establishmentsupporting

confidence: 79%

Water use of sorghum (<i>Sorghum bicolor</i> L. Moench) in response to varying planting dates evaluated under rainfed conditions

Hadebe¹,

Mabhaudhi²,

Modi³

2017

WSA

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“…Na cultura do arroz, a maior absorção de N pela planta garante maior proporção de clorofila e maior área foliar (BANCAL et al, 2008), , o que se reflete sobre a maior absorção de fotoassimilados. Segundo VAN OOSTEROM et al (2010), durante o enchimento de grãos, a senescência foliar pode afetar a oferta ou demanda de N na planta, sendo que o equilíbrio inadequado leva à senescência acelerada ou retardada (RAJCAN & TOLLENAAR, 1999), prejudicando diretamente a absorção dos fotoassimilados. Segundo GAN & AMASINO (1997), ocorrendo uma a deficiência de N e água durante o enchimento de grãos, há redução na disponibilidade de N, reduzindo a absorção deste nutriente e acelerando a senescência foliar.…”

Section: Resultsunclassified

Adubação nitrogenada sobre rendimento industrial e composição dos grãos de arroz irrigado

et al. 2013

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RESUMO O efeito de doses em cobertura de adubação nitrogenada foi avaliado sobre o rendimento do beneficiamento, a incidência de grãos gessados e barriga branca, os teores ABSTRACT The effect of nitrogen (N) fertilization levels was assessed by the industrial yield, the incidence of chalky and white belly grains as well as protein and amylose content of IRGA 422CLcultivar polished grains. The experiment was consisted with N levels applied in coverage using urea as a N source. The first application (0, 40, 63, 80 and 120kg ha -1 of N) was carried out on a main plot (10x5m) and the second application (0, 25, 50 and 75kg ha -1

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“…In this study, high nitrate supply was ample to promote early vegetative growth and excess nitrate was accumulated in all parts of the young plants. Despite receiving an ongoing high nitrate supply, stored nitrate was depleted by anthesis coinciding with an increased N demand from the onset of grain development (Sinclair et al, 1997;van Oosterom et al, 2010a). A larger N store in the stem could be facilitated by a greater capacity to store nitrate and may subsequently alleviate a N supply shortfall during grain filling.…”

Section: The Road To Improving Nue In Cereal Cropsmentioning

confidence: 99%

“…Van Oosterom et al (2010a) suggested leaf senescence of stay-green sorghum varieties could be further delayed if the translocation of stem N could be increased during grain fill. This would be advantageous because the benefits of the stay-green trait may be at odds with maximizing grain N through remobilization as demonstrated by greater PANU in stay-green sorghum.…”

Section: The Road To Improving Nue In Cereal Cropsmentioning

confidence: 99%

Post-anthesis nitrate uptake is critical to yield and grain protein content in Sorghum bicolor

Worland

Robinson

Jordan

et al. 2017

Journal of Plant Physiology

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Crops only use 50% of applied nitrogen (N) fertilizer creating N losses and pollution. Plants need to efficiently uptake and utilize N to meet growing global food demands. Here we investigate how the supply and timing of nitrate affects N status and yield in Sorghum bicolor (sorghum). Sorghum was grown in pots with either 10 mM (High) or 1 mM (Low) nitrate supply. Shortly before anthesis the nitrate supply was either maintained, increased 10-fold or eliminated. Leaf sheaths of sorghum grown with High nitrate accumulated nitrate in concentrations >3-times higher than leaves. Removal of nitrate supply pre-anthesis resulted in the rapid reduction of stored nitrate in all organs. Plants receiving a 10-fold increase in nitrate supply pre-anthesis achieved similar grain yield and protein content and 29% larger grains than those maintained on High nitrate, despite receiving 24% less nitrate over the whole growth period. In sorghum, plant available N is important throughout development, particularly anthesis and grain filling, for grain yield and grain protein content. Nitrate accumulation in leaf sheaths presents opportunities for the genetic analysis of mechanisms behind nitrate storage and remobilization in sorghum to improve N use efficiency.

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Functional dynamics of the nitrogen balance of sorghum. II. Grain filling period

Cited by 95 publications

References 49 publications

Water use of sorghum (<i>Sorghum bicolor</i> L. Moench) in response to varying planting dates evaluated under rainfed conditions

Water use of sorghum (<i>Sorghum bicolor</i> L. Moench) in response to varying planting dates evaluated under rainfed conditions

Adubação nitrogenada sobre rendimento industrial e composição dos grãos de arroz irrigado

Post-anthesis nitrate uptake is critical to yield and grain protein content in Sorghum bicolor

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