植物研究 ›› 2024, Vol. 44 ›› Issue (4): 517-527.doi: 10.7525/j.issn.1673-5102.2024.04.005
• 系统与进化 • 上一篇
收稿日期:
2024-01-18
出版日期:
2024-07-20
发布日期:
2024-07-09
通讯作者:
陈昕
E-mail:chenxinzhou@njfu.edu.cn
作者简介:
魏雪妍(1999—),女,硕士研究生,主要从事植物资源研究。
基金资助:
Xueyan WEI, Baomei TAN, Chi ZHANG, Jiabao LI, Xin CHEN()
Received:
2024-01-18
Online:
2024-07-20
Published:
2024-07-09
Contact:
Xin CHEN
E-mail:chenxinzhou@njfu.edu.cn
摘要:
为探讨叶表皮微形态特征的分类学意义,以中国产花楸属(Sorbus)冠萼组(sect. Aria)和落萼组(sect. Micromeles)11种1变种单叶类群为研究对象,利用光学显微镜和扫描电镜对其特征进行观察。结果如下:单叶花楸的叶表皮细胞呈多边形或不规则形;多边形细胞的垂周壁平直或弧状,不规则形细胞的垂周壁弧状或波状;表皮细胞面积在分类群间差异显著,且上表皮细胞面积均大于下表皮细胞;细胞表面纹饰有脊状、条状、皱褶、次生加厚、局部加厚,蜡质纹饰有壳状、颗粒状、片状、线状;叶光滑或具毛,毛被的位置、颜色、疏密和类型是重要的物种鉴定特征;气孔均为无规则型,分布于下表皮脉间区,保卫细胞具环形外缘、两极有或无T型加厚;气孔的长、宽、面积、密度和气孔指数在分类群间差异显著。由此,叶表皮微形态特征对单叶花楸的物种界定和鉴定具有重要价值。
中图分类号:
魏雪妍, 谭宝梅, 张弛, 李嘉宝, 陈昕. 11种1变种单叶花楸的叶表皮微形态[J]. 植物研究, 2024, 44(4): 517-527.
Xueyan WEI, Baomei TAN, Chi ZHANG, Jiabao LI, Xin CHEN. Foliar Epidermal Micromorphology of Eleven Species and One Variety of Simple-Leaved Sorbus[J]. Bulletin of Botanical Research, 2024, 44(4): 517-527.
表1
花楸属单叶类群植物采集信息
组 Section | 分类群名称 Taxa | 采集地 Locality | 采集人及凭证标本 Collector and voucher | 采集时间 Collection time |
---|---|---|---|---|
冠萼组 Aira | 冠萼花楸 S. coronata | 云南玉龙雪山 Yulong Snow Mountain,Yunnan | Xin Chen,Qi Qi,Xiaochen Zhang 1250,1253,1256 | 2018-09 |
开云花楸 S. guanii | 云南苍山 Cangshan,Yunnan | Xin Chen,Qi Qi,Xiaochen Zhang 1343,1352,1367 | 2018-09 | |
江南花楸 S. hemsleyi | 湖北神农架 Shennongjia,Hubei | Xin Chen,Wenwen Wang 0514,0531,0539 | 2016-05 | |
藏南花楸 S. heseltinei | 西藏波密 Bomi,Xizang | Xin Chen,Zhongren Xiong,Xiaochen Zhang 0956,0962,0965 | 2017-09 | |
大果花楸 S. megalocarpa | 四川龙苍沟 Longcanggou,Sichuan | Xin Chen,Xiaoyan Wang,Chunhui Wang 1891,1914,1915 | 2020-09 | |
雷公山花楸 S. needhamii | 贵州雷公山 Leigongshan,Guizhou | Xin Chen,Kailin Zhu,Jiabao Li 1464,1474,1492 | 2019-09 | |
落萼组 Micromeles | 毛背花楸 S. aronioides | 四川峨眉山 Emei Mountain,Sichuan | Xin Chen,Xiaoyan Wang,Chunhui Wang 1956,1959,1961 | 2020-09 |
美脉花楸 S. caloneura var. caloneura | 贵州梵净山 Fanjing Mountain,Guizhou | Xin Chen,Kailin Zhu,Jiabao Li 1564,1576,1577 | 2019-09 | |
广东美脉花楸 S. caloneura var. kwangtungensis | 湖南莽山 Mangshan,Hunan | Xin Chen,Jing Qiu 1736,1740,1742 | 2018-08 | |
棕脉花楸 S. dunnii | 江西三清山 Sanqing Mountain,Jiangxi | Xin Chen,Kailin Zhu,Jiabao Li 1429,1430,1442 | 2019-09 | |
毛序花楸 S. keissleri | 贵州梵净山 Fanjing Mountain,Guizhou | Xin Chen,Kailin Zhu,Jiabao Li 1578,1609,1614 | 2019-09 | |
泡吹叶花楸 S. meliosmifolia | 四川龙苍沟 Longcanggou,Sichuan | Xin Chen,Xiaoyan Wang,Chunhui Wang 1900,1904,1911 | 2020-09 |
表2
花楸属单叶类群叶表皮形态特征(定性性状)
组 Section | 分类群名称 Taxa | 表皮细胞形状(上/下) Epidermal cell shape(Ad/Ab) | 垂周壁(上/下) Anticlinal wall(Ad/Ab) | 表面纹饰(上/下) Cuticular ornamentation(Ad/Ab) | 气孔外缘 Outer stomatal rim |
---|---|---|---|---|---|
冠萼组 Aira | 冠萼花楸 S. coronata | 多边形、不规则形 Polygona,Irregular | 平直、弧状;*凹陷/不可见 Straight,Curved; *Sunken/Invisible | *-/皱褶 *-/Wrinkles | 凸起;环形外缘 Raised;Obvious annular outer edge |
开云花楸 S. guanii | 多边形、不规则形 Polygona,Irregular | 平直、弧状;*凹陷/不可见 Straight,Curved; *Sunken/Invisible | *-/不可见 *-/Invisible | 凸起;环形外缘;两极T型加厚 Raised;Obvious annular outer edge; T-piece at stomatal pole | |
江南花楸 S. hemsleyi | *多边形、不规则形/不规则形*Polygona,Irregular/Irregular | *平直、弧状/弧状、波状;隆起 *Straight,Curved/ Curved,Undulate;Raised | 局部加厚/脊状、皱褶 Thickened areas/ Ridges,Wrinkles | 凸起;环形外缘 Raised;Obvious annular outer edge | |
藏南花楸 S. heseltinei | 多边形、不规则形 Polygona,Irregular | 平直、弧状;隆起 Straight,Curved;Raised | *局部加厚/条状、脊状、皱褶 *Thickened areas/ Striaes,Ridges,Wrinkles | 凸起;环形外缘 Raised;Obvious annular outer edge | |
大果花楸 S. megalocarpa | 不规则形 Irregular | 弧状、波状;隆起 Curved,Undulate;Raised | 次生加厚、局部加厚 Secondary wall thickenings, Thickened areas | 凸起;环形外缘;两极T型加厚 Raised;Obvious annular outer edge; T-piece at stomatal pole | |
雷公山花楸 S. needhamii | 多边形、不规则形 Polygona,Irregular | 平直、弧状;隆起 Straight,Curved;Raised | *次生加厚/条状 *Secondary wall thickenings/Striaes | 凸起;环形外缘 Raised;Obvious annular outer edge | |
落萼组 Micromeles | 毛背花楸 S. aronioides | *多边形、不规则形/不规则形 *Polygona,Irregular/Irregular | *平直、弧状/弧状、波状;隆起 *Straight,Curved/ Curved,Undulate;Raised | *次生加厚、局部加厚/条状、局部加厚 *Secondary wall thickenings, Thickened areas/Striaes,Thickened areas | 水平;环形外缘;两极有或无T型加厚 Level;Obvious annular outer edge; With or without T-piece at stomatal pole |
美脉花楸 S. caloneura var. caloneura | 多边形、不规则形 Polygona,Irregular | 平直、弧状;隆起 Straight,Curved;Raised | *次生加厚/条状 *Secondary wall thickenings/Striaes | 水平;环形外缘 Level;Obvious annular outer edge | |
广东美脉花楸 S. caloneura var. kwangtungensis | 多边形、不规则形 Polygona,Irregular | *平直、弧状;凹陷/不可见 Straight,Curved; Sunken/Invisible | *-/条状 *-/Striaes | 水平;环形外缘;两极T型加厚 Level;Obvious annular outer edge; T-piece at stomatal pole | |
棕脉花楸 S. dunnii | 多边形、不规则形 Polygona,Irregular | 平直、弧状;*隆起/不可见 Straight,Curved;*Raised/Invisible | *次生加厚、局部加厚/不可见 *Secondary wall thickenings, Thickened areas/Invisible | 水平;环形外缘 Level;Obvious annular outer edge | |
毛序花楸S. keissleri | *多边形、不规则形/不规则形 Polygona,Irregular/Irregular | *平直、弧状;凹陷/弧状,波状;隆起 *Straight,Curved; Sunken/Curved,Undulate;Raised | *-/条状 *-/Striaes | 水平;环形外缘 Level;Obvious annular outer edge | |
泡吹叶花楸S. meliosmifolia | 多边形、不规则形 Polygona,Irregular | 平直、弧状;凹陷 Straight,Curved;Sunken | *-/条状 *-/Striaes | 凸起;环形外缘;两极T型加厚 Raised;Obvious annular outer edge; T-piece at stomatal pole |
表3
花楸属单叶类群叶表皮形态特征(定量性状)
组 Section | 分类群名称 Taxa | 上表皮细胞面积 Cell area of adaxial epidermis/μm2 | 下表皮细胞面积 Cell area of abaxial epidermis/μm2 | 气孔长 Stomatal length/μm | 气孔宽 Stomatal width/μm | 气孔面积 Stomatal area/μm2 | 气孔密度 Stomatal density/(个·mm-2) | 气孔指数 Stomatal index/% |
---|---|---|---|---|---|---|---|---|
冠萼组 Aira | 冠萼花楸 S. coronata | 594.07±144.91g | 448.58±111.67ef | 24.37±2.88c | 17.41±2.13e | 407.21±82.69f | 210.62±33.44h | 0.11±0.01e |
开云花楸 S. guanii | 428.70±93.18i | 368.27±83.07g | 26.31±3.55ab | 20.10±2.70b | 509.83±143.92b | 239.45±38.08gh | 0.11±0.02e | |
江南花楸 S. hemsleyi | 835.24±248.96c | 473.07±172.96de | 23.16±3.13d | 18.47±2.55d | 445.35±90.62de | 167.38±22.88i | 0.11±0.01e | |
藏南花楸 S. heseltinei | 661.04±133.98f | 375.27±105.05g | 21.74±2.58e | 16.33±2.04f | 368.70±74.55g | 258.98±41.39fg | 0.12±0.02e | |
大果花楸 S. megalocarpa | 1 083.48±267.21a | 447.70±107.67ef | 19.17±2.74f | 16.29±2.26f | 288.41±71.98h | 435.19±108.38a | 0.24±0.05a | |
雷公山花楸 S. needhamii | 515.33±120.79h | 363.84±83.02g | 24.42±3.98c | 19.14±2.75c | 442.19±100.09de | 339.41±48.37cd | 0.17±0.02c | |
落萼组 Micromeles | 毛背花楸 S. aronioides | 1 059.25±241.40a | 713.18±187.96a | 25.56±3.82b | 20.19±2.17b | 539.52±114.01a | 273.85±71.26ef | 0.20±0.04b |
美脉花楸 S. caloneura var. caloneura | 742.74±203.80e | 488.20±153.13d | 25.99±4.18ab | 20.95±2.99a | 424.22±118.90ef | 335.23±63.29d | 0.17±0.04c | |
广东美脉花楸 S. caloneura var. kwangtungensis | 773.92±264.53de | 541.84±165.69c | 26.40±2.96a | 20.38±2.52b | 498.79±88.42bc | 361.73±96.91bcd | 0.24±0.05a | |
棕脉花楸 S. dunnii | 568.12±122.29d | 442.93±96.62ef | 24.71±3.20c | 19.03±2.63c | 450.43±98.92d | 300.82±37.30e | 0.15±0.02d | |
毛序花楸 S. keissleri | 968.85±227.34b | 583.61±156.68b | 25.62±3.34ab | 19.28±2.42c | 478.83±89.00c | 384.51±67.41b | 0.23±0.03a | |
泡吹叶花楸 S. meliosmifolia | 800.71±169.66d | 424.62±113.69f | 21.32±2.70e | 17.23±2.34e | 401.77±99.47f | 371.96±72.74bc | 0.18±0.03c |
表4
花楸属单叶类群叶表皮性状的相关系数
叶表皮性状 Leaf epidermal characters | 上表皮细胞面积 Cellular area of adaxial epidermis | 下表皮细胞面积 Cellular area of abaxial epidermis | 气孔长 Stomatal length | 气孔宽 Stomatal width | 气孔面积 Stomatal area | 气孔密度 Stomatal density | 气孔指数 Stomatal index |
---|---|---|---|---|---|---|---|
上表皮细胞面积 Cellular area of adaxial epidermis | 1 | ||||||
下表皮细胞面积 Cellular area of abaxial epidermis | 0.410** | 1 | |||||
气孔长Stomatal length | -0.137** | 0.140** | 1 | ||||
气孔宽Stomatal width | -0.057* | 0.133** | 0.606** | 1 | |||
气孔面积Stomatal area | -0.079** | 0.170** | 0.395** | 0.369** | 1 | ||
气孔密度Stomatal density | 0.150** | -0.021 | -0.182** | -0.068 | -0.172** | 1 | |
气孔指数Stomatal index | 0.361** | 0.214** | -0.124* | -0.016 | -0.090 | 0.880** | 1 |
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