2012, Volume 14, Issue 3
Strategic Study of CAE >> 2012, Volume 14, Issue 3
Influence of drought and rewatering on the pattern of photosynthate partitioning of winter wheat
1. Institute of Ecological Science and Technology, Henan University, Kaifeng, Henan 475001, China;
2. College of Life Science, Henan University, Kaifeng, Henan 475001, China
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Abstract
In 2005—2006, two experiments were carried out to study the effect of drought stress on photosynthate partitioning patterns of winter wheat, as well as ecophysiological responses of winter wheat to drought and rewatering, at the Fengqiu Agro-ecological Experimental Station, Chinese Academy of Sciences. Jimai20 and Zhoumai18, two winter wheat cultivars differing in sensitivity to drought stress, were grown in the field under a retractable awning. In experiment, plants were subjected to severe drought stress at the reviving stage, and then rewatered respectively at the jointing stage (Wr1), the booting stage (Wr2) and the flowering stage (Wr3). Rewatering had compensatory effects on losses in winter wheat biomass induced by drought stress. Rewatering at the jointing stage had the greatest stimulating effect on biomass. Compensatory growth however did not lead to a full recovery of leaf area lost during the drought period. Rewatering at first suppressed root growth, and then stimulated it. Drought stress led to reduced photosynthate allocation in leaves and spikes, and increased photosynthate allocation in the stem, leaf sheaths and roots. Rewatering at the jointing stage, the booting stage and the flowering stage boosted photosynthate accumulation in leaves, the stem and grains respectively. Rewatering at all stages allowed full recovery of drought induced yield loss, by increasing number of spikelets at the jointing stage or 1 000 kernel weight at the booting and flowering stages.
Keywords
potosynthate ; partitioning coefficients ; water-solution carbohydrates ; winter wheat ; drought stress and rewatering
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References
[ 1 ] Barmabos R，Jiger K，Feher A.The effeet of drought and heatstress on reproduetive processes in cereals[J].Plant，Cell and Enviroument.2008.31（l）：l1-38.
[ 2 ] 谷松芳，丁圣意，药志英，等。干早胁道下冬小麦光合产物分配格局及其与产量的关系[J]，生态学报，2010（5）：1167-1173.
[ 3 ] Acevedo E，Hsino T C，Henderson D W，Immediate and subse-quent growth responaes to maize leaves to changes in water status[J]，Plant Pliysiology，197l，48：631-636.
[ 4 ] 罗远培，陈晓远。开花期复水对变早冬小麦的补偿效应研究[J].作物学报，2001（4）：512-516.
[ 5 ] 陈晓远，罗远培。不同生育期复水对受早冬小麦的补偿效应研究[J]。中国生态农业学报，2002（1）：35-37.
[ 6 ] 袁永慧，邓西平，干旱与复水对小麦光合和产量的影响[J].西北植物学报，2004，24（7）：1250-1254.
[ 7 ] 赵丽英，邓西平，山仑.开花前后变水条件对春小麦的补偿效应[J]，应用与环境生物学报，2002，8（5）：478-481. link1
[ 8 ] Blum A.Improving wheat grain filling under stress by stem reserve mohilizatiou[J].Eupbytica，1998，100（l）：77-83. link1
[ 9 ] Blum A，Belhassen E.Crop responses to drousht and the interpre-tation of alaplation[J].Plant Growtlh Regulation，1996，20（2）：135-148.
[10] SlaferGA，Abeledo lG.Miralles D J，et al.Pholoneriod sensi-tivity during stem clongation phase as an avenue to rise potential yield in wheat[J]，Euphytica.2001.119：191-197.
[11] Robakidze E A，Bobkova k S.Carbahydrate accumulation in si-herian spruce nerdles of various ages[J].Russian Journal of Plant Physiology，2003，50：573-580.
[12] 姜东。于振文，李永萸，等，高产小麦营养器官临时贮存物质积运及其对粒重的贡献[J]，作物学报，2003.29（1）：31-36. link1
[13] Yim ko，Kwon Y W，Bayer DE.Growth responses and alloca-tion of assimilates of rice seedlings by paclobutrazol and gibberel-lin treatiment[J]-Joumal of Plant Gromth Resulation，1997，16（1）：35-41. link1
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