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首页> 外文期刊>Journal of Plant Research >The physiological and metabolic changes in sugar beet seedlings under different levels of salt stress
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The physiological and metabolic changes in sugar beet seedlings under different levels of salt stress

机译：不同盐胁迫下糖甜菜幼苗的生理和代谢变化

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摘要

Salinity stress is a major limitation to global crop production. Sugar beet, one of the world's leading sugar crops, has stronger salt tolerant characteristics than other crops. To investigate the response to different levels of salt stress, sugar beet was grown hydroponically under 3 (control), 70, 140, 210 and 280 mM NaCl conditions. We found no differences in dry weight of the aerial part and leaf area between 70 mM NaCl and control conditions, although dry weight of the root and whole plant treated with 70 mM NaCl was lower than control seedlings. As salt concentrations increased, degree of growth arrest became obvious In addition, under salt stress, the highest concentrations of Na+ and Cl- were detected in the tissue of petioles and old leaves. N and K contents in the tissue of leave, petiole and root decreased rapidly with the increase of NaCl concentrations. P content showed an increasing pattern in these tissues. The activities of antioxidant enzymes such as superoxide dismutase, catalase, ascorbate peroxidase and glutathione peroxidase showed increasing patterns with increase in salt concentrations. Moreover, osmoprotectants such as free amino acids and betaine increased in concentration as the external salinity increased. Two organic acids (malate and citrate) involved in tricarboxylic acid (TCA)-cycle exhibited increasing contents under salt stress. Lastly, we found that Rubisco activity was inhibited under salt stress. The activity of NADP-malic enzyme, NADP-malate dehydrogenase and phosphoenolpyruvate carboxylase showed a trend that first increased and then decreased. Their activities were highest with salinity at 140 mM NaCl. Our study has contributed to the understanding of the sugar beet physiological and metabolic response mechanisms under different degrees of salt stress.
机译：盐度压力是全球作物生产的主要限制。甜菜是世界领先的糖作物之一，具有比其他作物更强的耐盐特性。为了研究对不同水平的盐胁迫，甘油甜菜在3（对照），70,140,​​210和280mM NaCl条件下生长甘油甜菜。我们发现在70mM NaCl和控制条件之间的空中部和叶面积的干重没有差异，尽管用70mM NaCl处理的根和整个植物的干重低于对照幼苗。随着盐浓度的增加，由于盐胁迫下，生长程度是显而易见的，在盐胁迫下，在叶柄和老叶的组织中检测到最高浓度的Na +和Cl-。在休假组织中N和K含量，随着NaCl浓度的增加，叶柄和根部的组织迅速下降。 P含量显示出这些组织中的越来越多的模式。抗氧化剂如超氧化物歧化酶，过氧化氢酶，抗坏血酸过氧化物酶和谷胱甘肽过氧化物酶的活性显示出盐浓度的增加的模式。此外，随着外部盐度的增加，游离氨基酸和甜菜碱等渗透压剂增加。参与三羧酸（TCA）-CYCLE的两种有机酸（苹果酸盐和柠檬酸盐）在盐胁迫下表现出增加的含量。最后，我们发现在盐胁迫下抑制了Rubisco活性。 NADP-苹果酶，NADP - 苹果酸脱氢酶和磷酸丙酮酸羧酸酯的活性显示出首次增加再增加的趋势。它们的活性最高，盐度在140 mm NaCl。我们的研究有助于了解不同程度的盐胁迫下的糖甜菜生理和代谢反应机制。

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  • 来源
    《Journal of Plant Research》 |2017年第6期|共15页
  • 作者

    Wang Yuguang; Stevanato Piergiorgio; Yu Lihua; Zhao Huijie; Sun Xuewei; Sun Fei; Li Jing; Geng Gui;

  • 作者单位

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

    Univ Padua Dipartimento Agron Anim Alimenti Risorse Nat &

    Am Dipartimento Agron DAFNAE Viale Univ 16 I-35020 Padua Italy;

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Sugar Beet Genet Breeding Heilongjiang Pr Harbin 150080 Heilongjiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Salt stress; Reactive oxygen species; Osmotic stress; Photosynthesis; Sugar beet;

    机译：盐胁迫;反应性氧物种;渗透胁迫;光合作用;甜菜;

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