Under investigation is an integrable generalization of the Fokas–Lenells equation, which can be derived from the negative power flow of a 2 × 2 matrix spectral problem with three potentials. Based on the gauge t...Under investigation is an integrable generalization of the Fokas–Lenells equation, which can be derived from the negative power flow of a 2 × 2 matrix spectral problem with three potentials. Based on the gauge transformation of the matrix spectral problem, one kind of Darboux transformation with multi-parameters for the three-component coupled Fokas–Lenells system is constructed. As a reduction, the N-fold Darboux transformation for the generalized Fokas–Lenells equation is obtained, from which the N-soliton solution in a compact Vandermonde-like determinant form is given. Particularly,the explicit one-and two-soliton solutions are presented and their dynamical behaviors are shown graphically.展开更多
[目的]研究不同盐碱胁迫对金丝楸幼苗生长、光合和生理指标的影响,并结合转录组测序分析,探究楸树耐盐碱的生理机制和分子机制。[方法]采用盆栽法对金丝楸幼苗进行不同盐碱胁迫处理,分析其生物量、光合及生理指标对不同盐碱响应的差异,...[目的]研究不同盐碱胁迫对金丝楸幼苗生长、光合和生理指标的影响,并结合转录组测序分析,探究楸树耐盐碱的生理机制和分子机制。[方法]采用盆栽法对金丝楸幼苗进行不同盐碱胁迫处理,分析其生物量、光合及生理指标对不同盐碱响应的差异,采用Illumina高通量测序技术进行转录组测序,通过生物信息学分析盐碱胁迫对转录水平的影响。[结果]不同盐碱胁迫下,金丝楸幼苗叶片受伤害程度为Na_(2)CO_(3)>混合盐碱>NaCl;新增株高和地径、地上部和根的干质量和鲜质量、生物量、根冠比均受到明显抑制,并随盐碱浓度增加而抑制加强,但生长胁迫指数均随浓度的增加而降低;丙二醛(MDA)含量和相对电导率都随胁迫浓度增加而不同程度上升,超氧化物歧化酶(SOD)活性、可溶性糖含量、脯氨酸(Pro)含量、叶绿素总量和光合速率都呈现先上升后下降的趋势。转录组测序共产生约60.4 Gb原始数据,组装得到55793个Unigenes,其中29534(52.93%)个Unigenes获得了注释;通过差异表达基因(DEGs)分析,3个比较组(CK vs NaCl,CK vs Na_(2)CO_(3)和CK vs混合盐碱)分别筛选出1779、2835和4059个DEGs;DEGs GO富集分析表明,膜的整体成分、膜的内在成分、催化活性、类异戊二烯代谢和合成过程、氧化还原酶活性等条目被显著富集;DEGs KEGG分析表明,苯丙素生物合成、淀粉和蔗糖代谢、植物激素信号转导、萜类主干生物合成和精氨酸代谢等通路被显著富集;此外,在DEGs中鉴定的bHLH、ERF、MYB-related、NAC、C2H2、WRKY、MYB和b ZIP转录因子家族成员最多。[结论]金丝楸主要通过积累可溶性糖和Pro,提高SOD酶活和光合作用来抵御盐碱胁迫,但都呈现“低促高抑”的现象,说明其具有一定阈值。金丝楸通过调节膜成分、催化活性、类异戊二烯代谢和生物合成过程、苯丙素生物合成、淀粉和蔗糖代谢、植物激素信号转导等生物过程和代谢途径,并结合有关转录因子共同响应盐碱胁迫。本研究为深入研究楸树耐盐碱生理机制和分子机制提供科学的理论依据。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12326305,11931017,and 12271490)the Excellent Youth Science Fund Project of Henan Province(Grant No.242300421158)+2 种基金the Natural Science Foundation of Henan Province(Grant No.232300420119)the Excellent Science and Technology Innovation Talent Support Program of ZUT(Grant No.K2023YXRC06)Funding for the Enhancement Program of Advantageous Discipline Strength of ZUT(2022)。
文摘Under investigation is an integrable generalization of the Fokas–Lenells equation, which can be derived from the negative power flow of a 2 × 2 matrix spectral problem with three potentials. Based on the gauge transformation of the matrix spectral problem, one kind of Darboux transformation with multi-parameters for the three-component coupled Fokas–Lenells system is constructed. As a reduction, the N-fold Darboux transformation for the generalized Fokas–Lenells equation is obtained, from which the N-soliton solution in a compact Vandermonde-like determinant form is given. Particularly,the explicit one-and two-soliton solutions are presented and their dynamical behaviors are shown graphically.
文摘[目的]研究不同盐碱胁迫对金丝楸幼苗生长、光合和生理指标的影响,并结合转录组测序分析,探究楸树耐盐碱的生理机制和分子机制。[方法]采用盆栽法对金丝楸幼苗进行不同盐碱胁迫处理,分析其生物量、光合及生理指标对不同盐碱响应的差异,采用Illumina高通量测序技术进行转录组测序,通过生物信息学分析盐碱胁迫对转录水平的影响。[结果]不同盐碱胁迫下,金丝楸幼苗叶片受伤害程度为Na_(2)CO_(3)>混合盐碱>NaCl;新增株高和地径、地上部和根的干质量和鲜质量、生物量、根冠比均受到明显抑制,并随盐碱浓度增加而抑制加强,但生长胁迫指数均随浓度的增加而降低;丙二醛(MDA)含量和相对电导率都随胁迫浓度增加而不同程度上升,超氧化物歧化酶(SOD)活性、可溶性糖含量、脯氨酸(Pro)含量、叶绿素总量和光合速率都呈现先上升后下降的趋势。转录组测序共产生约60.4 Gb原始数据,组装得到55793个Unigenes,其中29534(52.93%)个Unigenes获得了注释;通过差异表达基因(DEGs)分析,3个比较组(CK vs NaCl,CK vs Na_(2)CO_(3)和CK vs混合盐碱)分别筛选出1779、2835和4059个DEGs;DEGs GO富集分析表明,膜的整体成分、膜的内在成分、催化活性、类异戊二烯代谢和合成过程、氧化还原酶活性等条目被显著富集;DEGs KEGG分析表明,苯丙素生物合成、淀粉和蔗糖代谢、植物激素信号转导、萜类主干生物合成和精氨酸代谢等通路被显著富集;此外,在DEGs中鉴定的bHLH、ERF、MYB-related、NAC、C2H2、WRKY、MYB和b ZIP转录因子家族成员最多。[结论]金丝楸主要通过积累可溶性糖和Pro,提高SOD酶活和光合作用来抵御盐碱胁迫,但都呈现“低促高抑”的现象,说明其具有一定阈值。金丝楸通过调节膜成分、催化活性、类异戊二烯代谢和生物合成过程、苯丙素生物合成、淀粉和蔗糖代谢、植物激素信号转导等生物过程和代谢途径,并结合有关转录因子共同响应盐碱胁迫。本研究为深入研究楸树耐盐碱生理机制和分子机制提供科学的理论依据。
