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dc.contributor.authorZhao, Xinhua
dc.contributor.authorDu, Qi
dc.contributor.authorZhao, Yue
dc.contributor.authorWang, Huajie
dc.contributor.authorLi, Yanjie
dc.contributor.authorWang, Xiaoguang
dc.contributor.authorYu, Haiqiu
dc.date.accessioned2018-08-01T09:06:04Z
dc.date.available2018-08-01T09:06:04Z
dc.date.issued2016-01
dc.identifier.citationAgricultural Sciences, 2016, 7, 44-53en_US
dc.identifier.issn2156-8561
dc.identifier.urihttp://dx.doi.org/10.4236/as.2016.71005
dc.identifier.urihttp://hdl.handle.net/123456789/2048
dc.description.abstractLeaf early senescence caused by nutrition deficiency is one of the major limitation reasons in the world crop production. Potassium (K) is one of important nutrient elements in crop growth, which modifies dozens of enzyme activations and controls stomatal movement of photosynthesis. The yield and quality of maize (Zea Mays L.) have been limited due to K deficiency in plough layer soil. However, the mechanism of K deficiency tolerance is not fully understood in maize. In this study, two inbred lines, 099 (tolerance to potassium deficiency) and 835 (sensitive to potassium deficiency) were carried out to investigate the variations of chlorophyll content, photosynthetic and chlorophyll fluorescence parameters related with senescence under different K+ concentrations in maize at seedling stage. The results showed that the Chlorophyll a, b and (a + b) of 835 were significantly decreased under different K deficiency treatments, whereas those of 099 were remained normal. In addition, 099 showed a lower stomatal restriction and higher electronic transition capacity under different K deficiency treatments. The variations of F0, Fv/Fm, ΦPSⅡ, qP and NPQ in 835 were largely higher than those in 099. These results indicated that the inbred line 099 tolerance to K deficiency could keep chlorophyll content to maintain photosynthesis and to alleviate the injury of PSII under K deficiency condition. This study should contribute to explaining the physiological mechanism tolerance nutrition deficiency and improving breeding program in maize.en_US
dc.language.isoenen_US
dc.publisherScientific Researchen_US
dc.subjectPotassium Deficiencyen_US
dc.subjectMaizeen_US
dc.subjectLeaf Senescenceen_US
dc.subjectPhotosynthetic Parametersen_US
dc.subjectChlorophyll Fluorescenceen_US
dc.titleEffects of Different Potassium Stress on Leaf Photosynthesis and Chlorophyll Fluorescence in Maize (Zea Mays L.) at Seedling Stageen_US
dc.typeArticleen_US


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