植物研究 ›› 2023, Vol. 43 ›› Issue (5): 720-728.doi: 10.7525/j.issn.1673-5102.2023.05.009
收稿日期:
2023-06-12
出版日期:
2023-09-20
发布日期:
2023-09-05
通讯作者:
王姝
E-mail:lnbx625@163.com
作者简介:
陈家兴(1997—),男,硕士研究生,主要从事植物生态学研究。
基金资助:
Jiaxing CHEN, Shu WANG(), Linli CHEN, Xiali HOU, Qingzhu YANG, Renya YIN
Received:
2023-06-12
Online:
2023-09-20
Published:
2023-09-05
Contact:
Shu WANG
E-mail:lnbx625@163.com
About author:
CHEN Jiaxing(1997—),male,major in plant ecology.
Supported by:
摘要:
为研究干旱对入侵植物鬼针草(Bidens pilosa)和本地种醉鱼草(Buddleja lindleyana)种间关系及生长的影响,试验设置2种栽植方式:种间组(2种植物各1株栽植于1个花盆)和挡板组(在种间组中添加挡板分离2株植物),分别进行水分处理,包括对照组(90%~100%饱和含水量)和干旱组(30%~35%的饱和含水量),测量植物形态、生物量,计算植物各特征的相对生长率和相对邻株效应指数。结果表明:(1)干旱条件下鬼针草根、茎、叶和总生物量的种间关系均为促进;而水分条件改变醉鱼草的种间关系,干旱处理为竞争,对照处理下为促进。(2)干旱下种间作用增加了鬼针草根、茎、叶生物量的相对生长率和根冠比,降低了醉鱼草比叶面积和根冠比 (P<0.05)。(3)种间作用显著增加2个物种根长、根表面积和根尖数的生长(P<0.05)。研究表明,种间相互作用能提高干旱下鬼针草的生长表现,使其在干旱生境中具有优势,可能是鬼针草的入侵策略。
中图分类号:
陈家兴, 王姝, 陈林丽, 侯夏丽, 杨庆祝, 尹任娅. 干旱条件对鬼针草和醉鱼草种间相互作用及生长的影响[J]. 植物研究, 2023, 43(5): 720-728.
Jiaxing CHEN, Shu WANG, Linli CHEN, Xiali HOU, Qingzhu YANG, Renya YIN. Effects of Drought Conditions on Interspecific Interactions and Growth of Bidens pilosa and Buddleja lindleyana[J]. Bulletin of Botanical Research, 2023, 43(5): 720-728.
表1
不同水分条件下鬼针草和醉鱼草的种间相互作用
处理时间 Treatment duration/d | 植物特征 Plant traits | 水分条件 Water condition | 鬼针草Bidens pilosa | 醉鱼草Buddleja lindleyana | ||
---|---|---|---|---|---|---|
相对邻株效应指数 Relative neighbor effect | 种间相互作用 Interspecific interaction | 相对邻株效应指数 Relative neighbor effect | 种间相互作用 Interspecific interaction | |||
40 | 总生物量Total biomass | 对照Moist | 0.211 | - | 0.076 | - |
茎生物量Stem biomass | 对照Moist | 0.161 | - | -0.078 | + | |
叶生物量Leaf biomass | 对照Moist | 0.202 | - | 0.114 | - | |
根生物量Root biomass | 对照Moist | 0.256 | - | 0.112 | - | |
90 | 总生物量Total biomass | 对照Moist | -0.057 | + | -0.331 | + |
干旱Drought | -0.291 | + | 0.067 | - | ||
茎生物量Stem biomass | 对照Moist | -0.009 | + | -0.258 | + | |
干旱Drought | -0.278 | + | -0.584 | + | ||
叶生物量Leaf biomass | 对照Moist | -0.092 | + | 0.099 | - | |
干旱Drought | -0.173 | + | -0.395 | + | ||
根生物量Root biomass | 对照Moist | -0.089 | + | -0.424 | + | |
干旱Drought | -0.408 | + | 0.195 | - |
表2
物种( S )、水分处理( W )和种间作用( I )及它们的交互作用对植物各特征相对生长率三因素差分析
变异来源 Source of variance | 自由度 df | 相对生长率Relative growth rate | ||||||
---|---|---|---|---|---|---|---|---|
总生物量 Total biomass | 茎生物量 Stem biomass | 叶生物量 Leaf biomass | 根生物量 Root biomass | 根冠比 Root shoot ratio | 叶面积 Leaf area | 比叶面积 Specific leaf area | ||
物种(S) | 1 | 35.369** | 141.219** | 134.701** | 5.615* | 349.062** | 67.806** | 41.441** |
水分处理(W) | 1 | 15.323** | 2.966 | 26.557** | 10.079* | 0.053 | 65.391** | 5.970* |
种间作用(I) | 1 | 16.353** | 5.932* | 11.972* | 12.945* | 0.735 | 17.244** | 72.765** |
S×W | 1 | 1.817 | 1.856 | 15.130 | 0.027 | 1.210 | 13.731** | 1.510 |
S×I | 1 | 3.725 | 3.046 | 5.342* | 0.915 | 2.359 | 0.224 | 12.976* |
W×I | 1 | 0.555 | 0.538 | 0.001 | 2.635 | 19.429** | 2.091 | 1.102 |
S×W×I | 1 | 1.631 | 0.231 | 1.011 | 4.097* | 23.789** | 8.993* | 6.911* |
表3
水分处理和种间作用对根系生长的影响
物种 Species | 种间作用 Species interaction | 处理 Treatment | 相对生长率 Relative growth rate/% | |||
---|---|---|---|---|---|---|
根长 Root length | 根平均直径 Root average diameter | 根表面积 Root surface area | 根尖数量 Root tip number | |||
鬼针草 Bidens pilosa | 种间组 Interspecific group | 干旱Drought | 2.51±1.01Aa | 0.39±0.18Aa | 6.94±4.45Aa | 3.66±1.36Aa |
对照Moist | 3.38±1.32Aa | 0.40±0.15Aa | 8.75±4.17Aa | 4.71±1.66Aa | ||
挡板组 Barrier group | 干旱Drought | 0.56±0.52Ba | 0.21±0.21Aa | 1.62±1.52Bb | 0.75±0.52Ba | |
对照Moist | 0.87±0.47Ba | 0.34±0.11Aa | 3.14±1.28Ba | 1.40±0.88Ba | ||
醉鱼草 Buddleja lindleyana | 种间组 Interspecific group | 干旱Drought | 3.56±2.02Aa | 0.28±0.13Aa | 7.39±4.45Aa | 4.76±2.86Aa |
对照Moist | 3.71±1.44Aa | 0.28±0.18Aa | 7.18±3.83Aa | 5.73±2.85Aa | ||
挡板组 Barrier group | 干旱Drought | 1.57±1.00Ba | -0.10±0.10Ba | 3.45±2.24Ba | 2.22±1.34Ba | |
对照Moist | 1.14±0.84Ba | -0.13±0.10Ba | 1.90±1.77Ba | 3.28±1.77Ba |
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