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Mapping and breeding value evaluation of a semi-dominant semidwarf gene in upland rice

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Plant Diversity 2018年第5期40卷 238-244页

作者： Xiaoqian Chen Peng Xu Jiawu Zhou Dayun Tao Diqiu Yu Key Laboratory of tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences KunmingYunnan. 650223 China University of Chinese Academy of Sciences Beijing 100049 China Food Crops Research Institute Yunnan Academy of Agricultural Sciences (YAAS) Kunming 650200 China

Plant height is an important trait related to yield potential and plant architecture. A suitable plant height plays a crucial role in improvement of rice yield and lodging resistance. In this study, we found that the traditional upland landrace ＇Kaowenghan＇（KWH） showed a special semi-dwarf phenotype. To identify the semi-dwarf gene from KWH, we raised BC2F4 semi-dwarf introgression lines （IL） by hybridization of the japonica rice cultivar ＇Dianjingyoul＇（DJY1） and KWH in a DJY1 background. The plant height of the homozygous semi-dwarf IL （IL-87） was significantly reduced compared with that of DJY1. The phenotype of the F1 progeny of the semi-dwarf IL-87 and DJY1 showed that the semi-dwarf phenotype was semi- dominant. QTL mapping indicated that the semi-dwarf phenotype was controlled by a major QTL qDH1 and was localized between the markers RM6696 and RM12047 on chromosome 1. We also developed near-isogenic lines （NIL） from the BC3F3 population, and found that the yield of homozygous NIL （NIL-2） was not significantly different compared to DJY1. Breeding value evaluation through investigation of the plant height of the progeny of NIL （NIL-2） and cultivars from different genetic background indicate that the novel semi-dwarf gene shows potential as a genetic resource for rice breeding.

关键词： Semi-dwarf QTL mapping Breeding value evaluation

Influence of smoke, heat and fire on germination of woody species occurring in the dry valleys of southwest China

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Journal of Plant Ecology 2019年第6期12卷 931-940页

作者： Mareike Roeder Weidong Yang Kyle W.Tomlinson Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 666303China Institute of Floodplain Ecology Karlsruhe Institute of TechnologyJosefstraße 1D–76437 RastattGermany

Aims Savannahs depend on fire for their *** influences regeneration from seeds in several ways:it converts the environment into a more open space which can benefit the establishment of seedlings,and fire itself can also enhance germination by chemical and physical cues,such as smoke and *** is limited information as to how seed of Asian savannah species respond to fire,even though Asia has several dry vegetation types that are associated with *** main question was whether fire enhances or triggers the germination of woody species occurring in southwest Chinese dry valleys,which have savannah *** We conducted tests with heat(80°C)and smoke solution treatments,and tests with real fire by burning grass on top of sand trays containing *** tested 35 species,including savannah species,and gully and forest *** on seed availability,not all species were tested for all ***-six species had total germination>4%and these were used for *** Findings Heat increased germination of three species(strongest reaction:Dodonaea viscosa),smoke increased germination of five species(strongest reaction:Calotropis gigantea).Both treatments decreased germination for five and seven species,*** fire was detrimental for most species,except for ***,which is known to respond positively to heat *** though fire-related cues were not a trigger for germination for most species in our study,fire could still be crucial for regeneration by competition release.

关键词： smoke water burning biomass germination time Dodonaea viscosa Calotropis gigantea seed mass water content dark germination

Tsaokoin,a New Bicyclic Nonane from Amomum tsao-ko

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Chinese Chemical Letters 2001年第3期12卷 227-230页

作者： Qi Shi SONG Rong Wei TENG Xi Kui LIU Chong Ren YANG Kunming Institute of Botany Chinese Academy of SciencesKunming 650204 xishuangbanna tropical Botanic garden Chinese Academy of SciencesKunming 650223

7α-Hydroxy-8β,9β-H- cis- bicyclo[4,3,0]non-4-ene-4-aldehyde, a nonane compound with novel skeleton, named tsaokoin, was isolated from the fruits of Amomum tsao-ko. Its structure was established on the basis of spec... 详细信息

关键词： 7α-Hydroxy-8β 9β-H- cis- bicyclo[4.3.0]non-4-ene-4-aldehyde tsaokoin Amomum tsao-ko bicyclononane

GhWRKY33 negatively regulates jasmonate-mediated plant defense to Verticillium dahliae

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Plant Diversity 2023年第3期45卷 337-346页

作者： Yunrui Ji Minghui Mou Huimin Zhang Ruling Wang Songguo Wu Yifen Jing Haiyan Zhang Lanxin Li Zhifang Li Ligang Chen CAS Key Laboratory of tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 666303China Center of Economic Botany Core Botanical GardensChinese Academy of SciencesMenglunMenglaYunnan 666303China University of Chinese Academy of Sciences Beijing 100049China School of Life Sciences Henan UniversityKaifeng 475004China

Verticillium wilt,caused by Verticillium dahliae,seriously restricts the yield and quality improvement of *** studies have revealed the involvement of WRKY members in plant defense against ***,but the underlying mechanisms involved need to be further ***,we demonstrated that Gossypium hirsutum WRKY DNA-binding protein 33(GhWRKY33) functions as a negative regulator in plant defense against ***33 expression is induced rapidly by *** and methyl jasmonate,and overexpression of GhWRKY33 reduces plant tolerance to *** in *** RT-PCR analysis revealed that expression of several JA-associated genes was significantly repressed in GhWRKY33 overexpressing transgenic *** one-hybrid analysis revealed that GhWRKY33 may repress the transcription of both AtERF1 and GhERF2 through its binding to their ***-protein interaction analysis suggested that GhWRKY33 interacts with *** JASMONATE ZIM-domain protein 3(GhJAZ3).Similarly,overexpression of GhJAZ3 also decreases plant tolerance to ***,GhJAZ3 acts synergistically with GhWRKY33 to suppress both AtERF1 and GhERF2 *** results imply that GhWRKY33 may negatively regulate plant tolerance to *** via the JA-mediated signaling pathway.

关键词： GhWRKY33 Verticillium dahliae Jasmonate acid GhJAZ3 Defense response

Response of Chinese Wampee Axes and Maize Embryos to Dehydration at Different Rates

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Journal of Integrative Plant Biology 2009年第1期51卷 67-74页

作者： Hui Huang Song-Quan Song Xian-Jin Wu xishuangbanna tropical botanical garden the Chinese Academy of Sciences Mengla 666303 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Department of Biology Huaihua College Huaihua 418008 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Survival of wampee （Clausena lansium Skeels） axes and maize （Zea mays L.） embryos decreased with rapid and slow dehydration. Damage of wampee axes by rapid dehydration was much less than by slow dehydration, and that was contrary to maize embryos. The malondialdehyde contents of wampee axes and maize embryos rapidly increased with dehydration, those of wampee axes were lower during rapid dehydration than during slow dehydration, and those of maize embryos were higher during rapid dehydration than during slow dehydration. Activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX） and catalase （CAT） of wampee axes markedly increased during the early phase of dehydration, and then rapidly decreased, and those of rapidly dehydrated axes were higher than those of slow dehydrated axes when they were dehydrated to low water contents. Activities of SOD and APX of maize embryos notable decreased with dehydration. There were higher SOD activities and lower APX activities of slowly dehydrated maize embryos compared with rapidly dehydrated maize embryos. CAT activities of maize embryos markedly increased during the early phase of dehydration, and then decreased, and those of slowly dehydrated embryos were higher than those of rapidly dehydrated embryos during the late phase of dehydration.

关键词： Clausena lansium axis desiccation-sensitivity desiccation-tolerance malondialdehyde orthodox seed reactive oxygen species scavenging enzyme recalcitrant seed Zea mays embryo.

Effects of frugivorous birds on seed retention time and germination in xishuangbanna, southwest China

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Zoological Research 2015年第4期36卷 241-247页

作者： Ting-Ting SHI Bo WANG Rui-Chang QUAN Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences

The dispersal of many plants depends on transportation by birds as seed dispersers. The birds play an important role in long distance seed dispersal and may also affect seed germination. However, for plants who have many bird dispersers, the influence of dominant and non-dominant dispersers on retention time （dispersal distance） and germination remains poorly understood. In this study we performed experiments with captive frugivorous birds and fruiting plant species to study the effects of dominant and non-dominant dispersers on seed retention time （SRT） and germination （seed germination percentage and germination speed）. Our study showed a great interspecific variation in the effects of frugivorous birds on both SRT and germination. Some birds enhance the germination of a given plant species, but others do not. Generally, the dominant visitors improved the seed germination and performed longer seed retention time.

关键词： Dominant visitors Frugivores Interaction Seed germination xishuangbanna

Pollen size strongly correlates with stigma depth among Pedicularis species

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Journal of Integrative Plant Biology 2016年第10期58卷 818-821页

作者： Xiang-Ping Wang Wen-Bin Yu Shi-Guo Sun Shuang-Quan Huang College of Life Sciences Wuhan University Wuhan 430072China Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Mengla 666303China School of Life Sciences Central China Normal University Wuhan 430079China

Summary Darwin proposed that pollen size should be positively correlated with stigma depth rather than style length among species given that pollen tubes first enter the stigma autotrophically, then grow through the style heterotrophically. However, studies often show a posi-tive relationship between pollen size and style length. Five floral traits were observed to be correlated among 42 bumblebee-pollinated Pedicularis species （Orobancha- ceae） in which stigmas are distinct from styles. The phylogenetic independent contrast analysis revealed that pollen grain volume was more strongly correlated with stigma depth than with style length, consistent with Darwin＇s functional hypothesis between pollen size and stigma depth.

关键词： Pedicularis phylogenetic comparative analysis pollen grain volume pollen tube growth stigma depth style length trait correlation

Contrasting elevational diversity patterns for soil bacteria between two ecosystems divided by the treeline

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Science China(Life Sciences) 2016年第11期59卷 1177-1186页

作者： Guixiang Li Guorui Xu Congcong Shen Yong Tang Yuxin Zhang Keming Ma State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing 100085China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China

Above- and below-ground organisms are closely linked, but how elevational distribution pattern of soil microbes shifting across the treeline still remains unknown. Sampling of 140 plots with transect, we herein investigated soil bacterial distribution pattern from a temperate forest up to a subalpine meadow along an elevational gradient using Illumina sequencing. Our results revealed distinct elevational patterns of bacterial diversity above and below the treeline in responding to changes in soil condi- tions： a hollow elevational pattern in the forest （correlated with soil temperature, pH, and C：N ratio） and a significantly de- creasing pattem in the meadow （correlated with soil pH, and available phosphorus）. The bacterial community structure was also distinct between the forest and meadow, relating to soil pH in the forest and soil temperature in the meadow. Soil bacteria did not follow the distribution pattern of herb diversity, but bacterial community structure could be predicted by herb community composition. These results suggest that plant communities have an important influence on soil characteristics, and thus change the elevational distribution of soil bacteria. Our findings are useful for future assessments of climate change impacts on microbial community.

关键词： elevational gradient treeline soil bacteria IHumina MiSeq diversity pattern community structure

Mapping the habitat suitability of Ottelia species in Africa

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Plant Diversity 2022年第5期44卷 468-480页

作者： Boniface K.Ngarega John M.Nzei Josphat K.Saina Marwa Waseem A.Halmy Jin-Ming Chen Zhi-Zhong Li Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan430074China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesWuhan430074China University of Chinese Academy of Sciences Beijing100049China Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglun666303China Department of Environmental Sciences Faculty of ScienceAlexandria UniversityAlexandria21511Egypt

Understanding the influence of environmental covariates on plant distribution is critical,especially for aquatic plant *** change is likely to alter the distribution of aquatic ***,knowledge of this change on the burden of aquatic macroorganisms is often fraught with ***,a model genus for studying the evolution of the aquatic family Hydrocharitaceae,is mainly distributed in slow-flowing creeks,rivers,or lakes throughout pantropical regions in the *** to recent rapid climate changes,natural Ottelia populations have declined *** modeling the effects of climate change on the distribution of Ottelia species and assessing the degree of niche similarity,we sought to identify high suitability regions and help formulate conservation *** models use known background points to determine how environmental covariates vary spatially and produce continental maps of the distribution of the Ottelia species in ***,we estimated the possible influences of the optimistic and extreme pessimistic representative concentration pathways scenarios RCP 4.5 and RCP 8.5 for the *** results show that the distinct distribution patterns of studied Ottelia species were influenced by topography(elevation)and climate(e.g.,mean temperature of driest quarter,annual precipitation,and precipitation of the driest month).While there is a lack of accord in defining the limiting factors for the distribution of Ottelia species,it is clear that water-temperature conditions have promising effects when kept within optimal *** also note that climate change will impact Ottelia by accelerating fragmentation and habitat *** assessment of niche overlap revealed that Ottelia cylindrica and *** had slightly more similar niches than the other Ottelia *** present findings identify the need to enhance conservation efforts to safeguard natural Ottelia populations and provide a theoretical basis for the distr

关键词： African freshwater bodies Climate change Ecological niche modeling Habitat suitability Niche overlap