植物研究 ›› 2024, Vol. 44 ›› Issue (3): 410-419.doi: 10.7525/j.issn.1673-5102.2024.03.010
收稿日期:
2023-10-28
出版日期:
2024-05-20
发布日期:
2024-05-14
通讯作者:
黄柳菁
E-mail:huanglj@fafu.edu.cn
作者简介:
江燕东(1995—),男,硕士研究生,主要从事植物生态学方面的研究。
基金资助:
Yandong JIANG, Zhengdong PENG, Qi XU, Wanyi GAN, Liujing HUANG()
Received:
2023-10-28
Online:
2024-05-20
Published:
2024-05-14
Contact:
Liujing HUANG
E-mail:huanglj@fafu.edu.cn
摘要:
叶片、细根功能性状对植物的入侵过程具有重要影响,探究植物叶片、细根功能性状间的差异和联系,阐明植物地上地下部分对异质生境的响应,对于理解生物入侵机制具有重要意义。以3种生境(旱生、湿生、水生)的喜旱莲子草(Alternanthera philoxeroides)为研究对象,应用野外调查的方法,测定其叶片、细根共20个功能性状指标,分析其在不同生境中的差异性及其相关性。结果表明:(1)3种生境下植物功能性状具有显著差异 (P<0.05),其中旱生生境的叶鲜质量((1.12±0.14) g)、叶面积((4.80±0.57) cm2)、叶体积((1.12±0.16) cm3)最大;水生的叶长宽比(2.95±0.22)、根组织密度((4.14±0.52) g·cm-3)最大。(2)湿生叶片相对含水量变异系数最大(0.603),叶长宽比变异系数最小(0.057);旱生根分支数变异系数最大(0.453),水生根平均直径变异系数最小(0.065)。(3)叶片性状之间、细根性状之间联系密切,根-叶性状间的联系较少。(4)旱生偏向于获取型策略(高投入-低收益),湿生、水生偏向于资源保守型策略(低投入-高收益)。
中图分类号:
江燕东, 彭正东, 徐琪, 甘婉怡, 黄柳菁. 喜旱莲子草叶片、细根功能性状对异质生境的响应[J]. 植物研究, 2024, 44(3): 410-419.
Yandong JIANG, Zhengdong PENG, Qi XU, Wanyi GAN, Liujing HUANG. Responses of Leaf and Fine Root Functional Traits of Alternanthera philoxeroides to Heterogeneous Habitats[J]. Bulletin of Botanical Research, 2024, 44(3): 410-419.
表1
样地位置及3个生境的生态环境特征
样地编号 Sample plot number | 北纬度 Northern latitude | 东经度 East longitude | 生境类型 Habitat types | 环境特征 Environment characteristic |
---|---|---|---|---|
H1 | 26°1′44″ | 119°14′32″ | 旱生 Xeric | 光照强,土壤表面干燥,水分条件较差 High sunshine,dry soil surface and poor moisture conditions |
H2 | 26°1′31″ | 119°14′42″ | ||
H3 | 26°1′2″ | 119°15′45″ | ||
SH1 | 26°3′21″ | 119°10′41″ | 湿生 Wet | 光照强,土壤表面少量积水,水分条件充足 High sunshine,a small amount of water on the soil surface,adequate moisture |
SH2 | 26°3′21″ | 119°10′34″ | ||
SH3 | 26°4′7″ | 119°10′48″ | ||
S1 | 26°3′19″ | 119°10′52″ | 水生 Aquatic | 光照强,土壤全部没于水中,水分条件充足 High sunshine,the soil was completely submerged in water,adequate moisture |
S2 | 26°2′37″ | 119°11′31″ | ||
S3 | 26°1′53″ | 119°12′7″ |
表2
测定的20个功能性状指标
器官 Organ | 功能性状 Functional traits | 英文缩写 English abbreviation | 计算公式 A formula to calculate |
---|---|---|---|
叶 Leaf | 叶鲜质量Leaf fresh weight | LFW | |
叶生物量Leaf biomass | LB | ||
叶厚度Leaf thickness | LT | ||
叶体积Leaf volume | LV | 叶厚度×叶面积Leaf thickness×leaf area | |
叶面积leaf area | LA | ||
比叶面积Specific leaf area | SLA | 叶面积/叶干质量Leaf area/leaf dry weight | |
叶干物质含量Leaf dry matter content | LDMC | 叶片干质量/叶片饱和鲜质量 Leaf dry weight/leaf saturated fresh weight | |
叶相对含水量Leaf relative water content | LRWC | (叶饱和质量-叶鲜质量)/(叶饱和质量-叶干质量) (leaf saturated fresh weight-leaf fresh weight)/ (leaf saturated fresh weight-leaf dry weight) | |
叶组织密度Leaf tissue density | LTD | 叶干质量/叶体积Leaf dry weight/leaf volume | |
叶长宽比The ratio of leaf length to width | LW | 叶长/叶宽Leaf length/leaf width | |
根 Root | 根生物量Root biomass | RB | |
根平均直径Root average diameter | RAD | ||
根长Root length | RL | ||
根分支数Root branch number | RBN | ||
根体积Root volume | RV | ||
根面积Root area | RA | ||
根组织密度Root tissue density | RTD | 根体积/根干质量Root volume/root dry weight | |
比根长Specific root length | SRL | 根长/根干质量Root length/root dry weight | |
比根面积Specific root area | SRA | 根面积/根干质量Root area/root dry weight | |
根分支强度Root branching intensity | RBI | 分支数/根长Root branch number/root length |
表3
3种生境叶功能性状特征
生境 Habitat | 叶鲜质量 FLW/g | 叶生物量 LB/g | 叶干物质含量 LDMC | 叶厚度 LT/mm | 叶相对含水量 LRWC | 叶组织密度 LTD/(g·cm-3) | 叶面积 LA/cm2 | 比叶面积 SLA/(g·cm-2) | 叶体积 LV/cm3 | 叶长宽比 LW |
---|---|---|---|---|---|---|---|---|---|---|
旱生 Xeric habitat | 1.12±0.14a (0.124) | 0.15±0.03a (0.198) | 0.12±0.02a (0.176) | 0.23±0.01a (0.039) | 0.09±0.04b (0.475) | 0.13±0.02b (0.159) | 4.80±0.57a (0.120) | 33.83±5.91a (0.175) | 1.12±0.16a (0.165) | 2.23±0.13c (0.059) |
湿生 Hydric habitat | 0.91±0.18b (0.195) | 0.12±0.02ab (0.181) | 0.12±0.01a (0.077) | 0.19±0.02b (0.131) | 0.11±0.07a (0.603) | 0.17±0.05a (0.272) | 4.00±0.81b (0.203) | 32.57±4.82a (0.148) | 0.77±0.24b (0.159) | 2.68±0.15b (0.057) |
水生 Hydrophytic habitat | 0.74±0.04c(0.059) | 0.10±0.03b (0.258) | 0.13±0.04a (0.268) | 0.20±0.02b (0.100) | 0.05±0.03b (0.501) | 0.18±0.04a (0.240) | 2.95±0.36c (0.121) | 30.35±7.91a (0.261) | 0.57±0.04c (0.321) | 2.95±0.22a (0.076) |
表4
3种生境细根功能性状特征
生境 Habitat | 根生物量 RB/g | 根长 RL/cm | 比根长 SRL/(cm·g-1) | 根平均直径 RAD/mm | 根面积 RA/cm2 | 比根面积 SRA/(g·cm-2) | 根组织密度 RTD/(g·cm-3) | 根体积 RV/cm3 | 根分支数 RBN | 根分支强度 RBI/cm–1 |
---|---|---|---|---|---|---|---|---|---|---|
旱生 Xeric habitat | 0.06±0.02b (0.287) | 419.07±79.44a (0.19) | 7 455.19±2 500.86a (0.335) | 0.26±0.05a (0.191) | 33.29±5.94b (0.179) | 571.05±102.77a (0.18) | 3.60±0.57b (0.16) | 0.22±0.07b (0.325) | 1 912.78±867.44a (0.453) | 4.41±1.31a (0.296) |
湿生 Hydric habitat | 0.16±0.06a (0.363) | 500.67±138.92a (0.277) | 3 505.53±1 229.14b (0.351) | 0.29±0.04a (0.128) | 45.32±10.92a (0.241) | 312.04±82.85b (0.265) | 2.24±0.51c (0.227) | 0.33±0.08a (0.254) | 2 685.67±1 001.01a (0.373) | 5.33±0.79a (0.149) |
水生 Hydrophytic habitat | 0.06±0.02b (0.297) | 494.45±136.41a (0.276) | 8 086.24±1 254.11a (0.155) | 0.26±0.02a (0.065) | 39.43±9.43ab (0.239) | 647.35±82.13a (0.127) | 4.14±0.52a (0.126) | 0.25±0.05b (0.213) | 2 693.56±1 041.49a (0.387) | 5.33±0.91a (0.171) |
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