唐古特白刺枝叶形态结构对水分条件的响应

doi:10.13292/j.1000-4890.202306.016

生态学杂志 ›› 2023, Vol. 42 ›› Issue (6): 1290-1298.doi: 10.13292/j.1000-4890.202306.016

唐古特白刺枝叶形态结构对水分条件的响应

赵杏花^1,2,张格³,韩彦隆^1,2,郭璐^1,2,何玉婷^1,2,高永^1,2*

（¹内蒙古农业大学沙漠治理学院，呼和浩特 010019； ²荒漠生态系统保护与修复国家林业和草原局重点实验室，呼和浩特 010019； ³中国林业科学研究院沙漠林业实验中心，磴口 015200）

出版日期:2023-06-10 发布日期:2023-06-05

Responses of branch and leaf morphology and structure of Nitraria tangutorum to water conditions

ZHAO Xinghua^1,2, ZHANG Ge³, HAN Yanlong^1,2, GUO Lu^1,2, HE Yuting^1,2, GAO Yong^1,2*

(¹College of Desertification Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010019, China; ²Key Laboratory of Desert Ecosystem Conservation and Restoration, State Forestry and Grassland Administration of China, Inner Mongolia Agricultural University, Hohhot 010019, China; ³Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, China).

Online:2023-06-10 Published:2023-06-05

摘要/Abstract

摘要： 土壤水分是影响植物枝叶形态建成及叶片结构的重要因素。本研究旨在探究唐古特白刺对水分条件的适应规律，为人工诱导不同株丛形态的唐古特白刺提供理论依据。以一年生唐古特白刺幼苗为对象，采取盆栽控水法，设置6个水分处理，即正常供水量W4(以插穗采集地3—8月多年平均降水量为依据，计算得出)、轻度干旱胁迫W3、中度干旱胁迫W2、重度干旱胁迫W1(以W4为基准，分别减少15%、30%和45%)和轻度增水W5、中度增水W6(以W4为基准，分别增加15%和30%)，处理10、30、50、70和90 d后，测量各级枝条的长度、节数、节间长度、基径、分枝角度、分枝比，叶片长度、宽度、厚度、长宽比及解剖结构等形态指标。结果表明：轻度、中度干旱胁迫对唐古特白刺枝条生长有明显抑制作用，但有利于枝条节的形成和分枝比的增加；中度干旱胁迫处理后，唐古特白刺叶片出现“复表皮”现象，叶肉中出现黏液细胞。随着供水量增加，唐古特白刺叶片长度、宽度、厚度、长宽比呈增大趋势。轻度增水有利于促进各级枝条生长，一级枝条分枝角最大，试验后期一级枝条分枝角达到43.5°，唐古特白刺株丛由开始的“直立状”逐渐向“半直立状”过渡。中度增水处理的叶片达到最大，叶片长度为21.46 mm、宽度为4.69 mm、厚度为0.47 mm、叶片长宽比为4.62；枝条生长出现徒长现象。

关键词: 干旱胁迫, 增雨条件, 枝叶性状, 复表皮, 黏液细胞

Abstract: Soil moisture is an important factor affecting the morphogenesis of branches and leaves and leaf structure. The purpose of this study was to explore the adaptability of Nitraria tangutorum to water conditions and provide theoretical basis for artificial induction of different morphologies of N. tangutorum. An experiment with potted water control method was conducted using one-year-old stem cuttings of N. tangutorum under six levels of water supply. Water supply calculated based on the average precipitation of the cuttings collection site from March to August in recent ten years was used as control (W4). The other five treatments were then designed as reducing water supply by 15%, 30%, and 45% (designated as W3, W2, W1) and increasing water supply by 15%, 30% (W5, W6). After 10, 30, 50, 70, and 90 days of treatment, branch length, number of nodes, internode length, basal diameter, branching angle, branching ratio, leaf length, width, thickness, length to width ratio and leaf anatomical structure were measured. The results showed that the branch growth of N. tangutorum was significantly inhibited while the node formation and branching ratio were promoted under W3 and W2 treatments. Double layers of epidermis and mucous cells appeared in leaves of N. tangutorum under W2 treatment. With the increases of water supply, leaf length, width, thickness, and length to width ratio of N. tangutorum showed an increasing trend. The branch growth of N. tangutorum was promoted under W5 treatment, especially for primary branch angle. The primary branch angle was 43.5° in the later stage of the experiment. Plant clump shape of N. tangutorum transited from “upright” to “semi-upright”. Under W6 treatment, leaf size reached to the maximum, with length of 21.46 mm, width of 4.69 mm, thickness of 0.47 mm, the length to width ratio of 4.62, and the branch showed excessive growth.

Key words: drought stress, rainfall increasing condition, branch and leaf traits, compound epidermis, mucous cell.

赵杏花, 张格, 韩彦隆, 郭璐, 何玉婷, 高永. 唐古特白刺枝叶形态结构对水分条件的响应[J]. 生态学杂志, 2023, 42(6): 1290-1298.

ZHAO Xinghua, ZHANG Ge, HAN Yanlong, GUO Lu, HE Yuting, GAO Yong. Responses of branch and leaf morphology and structure of Nitraria tangutorum to water conditions[J]. Chinese Journal of Ecology, 2023, 42(6): 1290-1298.

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唐古特白刺枝叶形态结构对水分条件的响应

Responses of branch and leaf morphology and structure of Nitraria tangutorum to water conditions

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