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Morphological and physiological differences in heteromorphic leaves of male and female Populus euphratica Oliv.

Journal of Arid Land 2022年第12期14卷 1456-1469页

作者： LI Xiu ZHAI Juntuan LI Zhijun College of Life Sciences and Technology Tarim UniversityAlar 843300China Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin of Xinjiang Production&Construction Corps Alar 843300China

Leaf traits can directly reflect the adaptation strategies of plants to the ***,there is limited knowledge on the adaptation strategies of heteromorphic leaves of male and female Populus euphratica *** response to individual developmental stages(i.e.,diameter class)and canopy height *** this study,morphological and physiological properties of heteromorphic leaves of male and female *** were *** showed that both male and female *** exhibited increased leaf area(LA),leaf dry weight(LDW),leaf thickness(LT),net photosynthetic rate(P_(n)),transpiration rate(T_(r)),stomatal conductance(g_(s)),proline(Pro),and malondialdehyde(MDA)concentration,decreased leaf shape index(LI)and specific leaf area(SLA)with increasing diameter and canopy *** water potential(LWP)increased with increasing diameter,LWP decreased significantly with increasing canopy height in both sexes,and carbon isotope fraction(δ^(13)C)increased significantly with canopy height in both sexes,all of which showed obvious resistance ***,males showed greater LA,LT,P_(n),T_(r),and Pro than females at the same canopy height,and males showed significantly higher LA,SLA,LT,P_(n),T_(r),g_(s),and MDA,but lower LWP and δ_(1)3C than females at the same canopy height,suggesting that male *** have stronger photosynthetic and osmoregulatory abilities,and are sensitive to water ***,difference between male and female *** is closely related to the increase in individual diameter class and canopy *** summary,male plants showed higher stress tolerance than female plants,and differences in P_(n),g_(s),T_(r),Pro,MDA,δ_(13)C,and LWP between females and males were related to changes in leaf morphology,diameter class,and canopy *** results of this study provide a theory for the differences in growth adaptation strategies during individual development of ***.

关键词： arid area canopy height dioecious plants morphology physiological characteristics

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Transcriptome analysis of Idesia polycarpa Maxim. var vestita Diels fl owers during sex differentiation

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Journal of Forestry Research 2020年第6期31卷 2463-2478页

作者： Tingting Li Fosheng Li Lanju Mei Na Li Min Yao Lin Tang Key Laboratory of Bio-Resources and Eco-Environment Ministry of EducationCollege of Life SciencesSichuan UniversityChengdu 610064SichuanPeople’s Republic of China National and Local Joint Engineering Laboratory for Energy Plant Bio-Oil Production and Application Chengdu 610065People’s Republic of China

Idesia polycarpa *** vestita *** a dioecious tree species native to eastern *** are diffi culties associated with distinguishing the sex of the plant at the seedling *** order to explore the mechanism of sex diff erentiation in fl ower development,we conducted the transcriptome profi les of male and female fl owers at early,metaphase and late developmental *** 123,335 unigenes with a total length of 83,996 Mb and an average length of 168 bp were *** unigenes were blasted into Nr,Nt,Pfam,KOG/COG,Swiss-prot,KEGG,GO *** analysis demonstrated that *** and black cottonwood had the highest homology with the alignment of 92,871 *** study identifi ed 80 groups of transcription factor families with a total of 1475 unigenes,mainly including MYB,WRKY,AP2 and bHLH transcription factor *** pathway analysis showed that the expression of numerous plant hormones(cytokinin,gibberellin and ethylene)and fl avonoid biosynthesis pathway were diff erent at various stages of female and male fl ower *** addition,a number of unigenes associated with fl owering were identifi ed which were key genes associated with photoperiodic,vernalization,thermosensory,gibberellin,and autonomic *** results show that *** fl oral organ development was in accordance with the ABCDE model,in which the down-regulation of the B gene family might aff ect stamen fertility in late stages of female fl ower *** experiments validated that the expression patterns of 15 unigenes were consistent with those in RNA-seq *** results highlight a central role for plant sex identifi cation in seedling production and a sex-determining mechanism for dioecious *** addition,the transcriptome data provided a theoretical basis for *** genetic diversity analysis and molecular-assisted breeding.

关键词： dioecious plants Transcriptome sequencing Sex diff erentiation Idesia polycarpa Floral organ development Transcription factor

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