共查询到18条相似文献,搜索用时 500 毫秒
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缺硼槟榔幼苗的生理反应和根系发育特征 总被引:1,自引:1,他引:0
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研究高硼胁迫对纽荷尔脐橙幼苗微量元素(B、Mn、Fe、Cu、Zn、Mo)吸收与分配的影响,以期为脐橙的硼肥营养生理和生产中科学施用微量元素提供理论依据。以纽荷尔脐橙幼苗为试材,利用营养液培养方法进行高硼处理(B:200μmol/L)和适硼处理(B:20μmol/L,对照),测定根、砧木茎、上部接穗茎、下部接穗茎、上部叶、下部叶6个部位微量元素的含量,并计算各部位微量元素积累量和分配率。高硼胁迫下纽荷尔脐橙幼苗根干物重显著下降,其他部位干物重没有明显变化,且各部位B含量和积累量均显著增加,B在叶片中的分配率也明显提高。Mn、Fe、Zn、Mo主要在根部富集,高硼胁迫使各部位中的Mn含量显著下降,根部Fe含量和积累量也显著降低,但各部位中Mn、Cu、Mo的分配率无明显变化;高硼胁迫显著降低了下部叶Cu含量,也使上部接穗茎Zn含量和积累量显著下降,并且根部和砧木茎Mo含量显著增加。 相似文献
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硼对不同甘蓝型油菜品种细胞壁酶活性的影响 总被引:11,自引:2,他引:9
在溶液培养条件下,选用甘蓝型油菜硼高效和硼低效品种,研究硼对细胞壁酶活性的影响。结果表明,不同生育期缺硼均使油菜根系细胞壁过氧化物酶(POD) 活性显著升高;上部叶片细胞壁POD 活性显著下降;下部叶片处理间的差异不显著,但同一生育期细胞壁POD 活性硼高效品种显著高于硼低效品种。油菜根系细胞壁IAA 氧化酶活性,缺硼时两品种薹期和花期显著升高,苗期差异不显著;上部叶片细胞壁IAA 氧化酶活性缺硼时显著降低,硼高效品种花期差异不显著;缺硼对下部叶片细胞壁IAA 氧化酶活性影响不大,但低效品种花期该酶活性显著降低。 相似文献
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缺硼条件下两种不同砧木“纽荷尔”脐橙矿质元素含量变化的比较 总被引:4,自引:1,他引:3
采用溶液培养试验,研究了缺硼对两种不同砧木纽荷尔脐橙硼、锌、钙、镁和钾元素含量变化。结果表明,缺硼显著降低了枳壳砧木纽荷尔脐橙体内硼含量而对锌含量影响不大; 相反,缺硼对枳橙砧木脐橙体内硼含量的影响不是很大,而显著降低了其叶片中锌的含量。这可能是缺硼条件下枳壳砧木脐橙容易出现缺硼症状,而枳橙砧木脐橙容易出现缺锌症状的原因之一。与对照相比,缺硼处理的枳壳砧木脐橙叶的钙含量明显增加; 而根的钾含量明显高于枳橙砧木橙根。这些结果与枳壳砧木脐橙对硼更敏感有一定的关系。缺硼对镁含量的影响两种砧木间基本没有差异。 相似文献
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利用比色法和聚丙烯凝胶电泳法分析了不同硼营养状况下甘蓝型油菜的幼苗叶片及开花期花药内可溶性蛋白质含量及组分的变化。结果表明,缺硼或硼过量部会造成幼苗叶片及花药内蛋白质含量显著下降;从电泳图谱中也可看出,可溶性蛋白质的组分也发生了变化。不适当供硼(缺硼或硼过量)幼苗叶片及花药内所测的大部分蛋白质含量减少,有个别的蛋白质增加或缺失。 相似文献
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《农业环境与发展》2016,(1)
为了揭示钾、硼对棉花叶片细胞膜及硼利用的影响,本试验以棉花作为研究材料,采用营养液培养方式,研究了不同钾、硼处理叶片逆境下细胞膜及与细胞壁结合的硼比例的变化。结果表明,施钾水平为20 mg·L~(-1)时,缺硼(0 mg B·L~(-1))阻碍棉花地上部生长和干物质的积累,且与正常硼(0.2 mg B·L~(-1))相比,叶片逆境生理指标均显著升高,束缚态硼相对含量、R值(半束缚态硼/自由态硼)、细胞壁提取率和叶片总细胞壁硼占叶片硼的比例均有所升高;施钾水平为2 mg·L~(-1)时,缺硼叶片逆境生理指标、自由态硼和半束缚态相对含量及R值较正常硼处理也均显著升高,但束缚态硼相对含量和叶片总细胞壁硼占叶片硼的比例降低。因此,适钾与低钾时,缺硼均会明显破坏细胞膜透性。适钾条件下,缺硼导致细胞壁增厚,在细胞壁与果胶多糖结合的硼的比例升高;而低钾时,缺硼对于叶片细胞壁提取率无显著影响,进入叶片细胞质的硼的比例升高,但与果胶多糖结合的硼的比例降低。 相似文献
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硼对不同硼效率甘蓝型油菜品种细胞壁组成的影响 总被引:8,自引:4,他引:8
采用营养液培养技术 ,研究B对不同B效率油菜品种细胞壁组成的影响。结果表明 ,根系细胞壁提取率及细胞壁纤维素含量高于叶片 ,果胶含量低于叶片 ,半纤维素含量和叶片差异不大。缺B使细胞壁提取率升高 ,但对根系和叶片细胞壁组成的影响不显著。不同B效率油菜品种细胞壁组成在根系和下部叶中差异不大 ,上部叶片高效品种螯合剂可溶性果胶含量显著高于低效品种 ,碱溶性果胶含量显著低于低效品种 ;半纤维素和纤维素含量及果胶总量差异不大 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(4):439-453
The study aimed to determine if the variability of the effect of boron (B) deficiency on Newhall navel orange grafted on trifoliate orange (deficient-B-sensitive) and on citrange (deficient-B-tolerant) can be explained on the basis of changes in cell-wall content and in cell-wall B and calcium (Ca) concentrations. The plants were cultured in the nutrient solution (with or without B) for 65 days. Boron deficiency increased the cell-wall content in old leaves (leaves from last season) of trifoliate orange but had no impact on citrange. Boron deficiency did not reduce B concentration in cell walls of old leaves of citrange-grafted plants but increased their Ca concentration. For trifoliate-orange-grafted plants, however, B deficiency decreased the B concentration in cell walls of old leaves and did not increase their Ca concentration. The changes of B and Ca concentrations between with and without B supply in pectin were in good agreement with the changes of those in cell walls. The relatively greater ability of citrange-grafted plants to maintain B and Ca in the cell wall may contribute to their tolerance to low external B. 相似文献
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云南曲靖烟区优质烤烟的适宜土壤有效硫和烟叶硫含量研究 总被引:3,自引:1,他引:2
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不同梨砧木对缺铁胁迫的生理响应差异研究 总被引:1,自引:0,他引:1
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In southern Jiangxi province of China, ‘Newhall’(Citrus sinensis Osbeck) navel orange presented a conspicuous symptom of boron (B) deficiency in mature leaves, whereas B deficiency symptoms were not manifested on ‘Skagg's Bonanza’(C. sinensis Osbeck) navel orange. In this study, changes in concentrations of B, calcium (Ca), potassium (K), magnesium (Mg), manganese (Mn), and zinc (Zn) were comparatively investigated in the structural parts of the fruit (rind and pulp) and leaves (old leaves from last season and spring-flush leaves from current year) of ‘Newhall’ and ‘Skagg's Bonanza’ navel orange during the growing season. Two peaks of B concentrations were observed in the rind of the two cultivars during fruitlet growth and fruit enlargement, respectively. Boron concentrations were relatively high in the rind during fruitlet growth, and then decreased in both rind and pulp, whereas, during middle and late fruit enlargement significant increases were found for B in both rind and pulp of the two cultivars. Boron concentrations in old leaves of ‘Newhall’ decreased progressively and remained relatively low, whereas that of ‘Skagg's Bonanza’ was relatively high and changed slightly as the season progresses. Both Ca and K concentrations were above the critical threshold values, while their dynamics were reverse to that of B in fruit and leaves during certain times. Old leaf Mg concentrations of samples at 140 days after full bloom from the two cultivars and spring-flush leaves from ‘Newhall’ were below the threshold limit for sufficiency. In addition, Mg in old leaves was much lower from ‘Newhall’ than from ‘Skagg's Bonanza’. Spring-flush leaf concentrations of Mn and Zn and Mn concentrations in old leaves from ‘Newhall’ were relatively lacking during middle and late season, which accelerated the occurrence of B deficiency symptoms on mature leaves of ‘Newhall.’ 相似文献
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