植物生态学报 ›› 2009, Vol. 33 ›› Issue (6): 1199-1207.DOI: 10.3773/j.issn.1005-264x.2009.06.021
收稿日期:
2009-05-31
接受日期:
2009-08-11
出版日期:
2009-05-31
发布日期:
2021-04-29
通讯作者:
张硕新
作者简介:
*(sxzhang@nwsuaf.edu.cn)基金资助:
HUANG Ju-Ying1, YU Hai-Long2, ZHANG Shuo-Xin3,4,*()
Received:
2009-05-31
Accepted:
2009-08-11
Online:
2009-05-31
Published:
2021-04-29
Contact:
ZHANG Shuo-Xin
摘要:
通过干旱胁迫处理(土壤含水量为田间持水量的30%~40%)和正常水分供给(土壤含水量为田间持水量的70%~80%)两种盆栽控制试验, 研究了耐旱树种元宝枫(Acer truncatum)和中生树种女贞(Ligustrum lucidum)枝条木质部栓塞(以导水率损失百分数(Percentage loss of hydraulic conductivity, PLC)衡量)和水势(Water potential, WP)对钾(K)素添加的响应。结果表明: 两个树种PLC的日变化均呈现先升后降的规律, 而WP呈现相反的变化趋势; 添加K素显著提高了两个树种的PLC, 除了干旱胁迫下的元宝枫, 其他树种和处理的PLC随K素含量的增加而增加; K素显著降低了干旱胁迫下元宝枫和女贞的WP,但对正常水分供给下两个树种的WP无显著影响; 元宝枫的平均PLC高于女贞, 平均WP低于女贞。以上结果表明, K素可能通过降低枝条的WP, 促进树种木质部栓塞的形成, 达到限制水分进一步丧失的目的。K素在调节气孔运动、渗透作用等方面的作用, 可能是树种木质部栓塞形成的诱 因。
黄菊莹, 余海龙, 张硕新. 施水和钾素添加对元宝枫和女贞木质部栓塞的影响. 植物生态学报, 2009, 33(6): 1199-1207. DOI: 10.3773/j.issn.1005-264x.2009.06.021
HUANG Ju-Ying, YU Hai-Long, ZHANG Shuo-Xin. EFFECTS OF POTASSIUM ADDITION AND WATER SUPPLY ON XYLEM EMBOLISM IN ACER TRUNCATUMAND LIGUSTRUM LUCIDUM. Chinese Journal of Plant Ecology, 2009, 33(6): 1199-1207. DOI: 10.3773/j.issn.1005-264x.2009.06.021
K2SO4(46% K) | ||||
---|---|---|---|---|
添加梯度 K addition gradient | 0 | 30 | 45 | 60 |
纯K含量 K content | 0 | 13.8 | 18.4 | 27.6 |
简写 Abbreviation | K0 | K30 | K45 | K60 |
表1 盆栽苗木施肥试验设计(g·盆-1)
Table 1 Fertilization experiment design of seedlings in pot culture experiment (g·pot -1)
K2SO4(46% K) | ||||
---|---|---|---|---|
添加梯度 K addition gradient | 0 | 30 | 45 | 60 |
纯K含量 K content | 0 | 13.8 | 18.4 | 27.6 |
简写 Abbreviation | K0 | K30 | K45 | K60 |
图1 元宝枫和女贞枝条导水率损失百分数(PLC)的日变化 A和B分别代表干旱胁迫和正常水分处理下的元宝枫; C和D分别代表干旱胁迫和正常水分处理下的女贞 A and B for A. truncatum under drought-stressed and well-watered regimes, respectively; C and D for L. lucidum, accordingly K0、K30、K45和K60: 同表1 See Table 1
Fig. 1 Daily variation in percentage loss of hydraulic conductivity (PLC) of Acer truncatumand Ligustrum lucidum twigs
树种 Species | 来源 Source | df | F | p | ||||
---|---|---|---|---|---|---|---|---|
元宝枫 Acer truncatum | 水分处理 Water regime | 1 | 2.304 | 0.139 | ||||
K素添加梯度 K addition gradient | 3 | 6.437 | 0.002 | |||||
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 3.822 | 0.019 | |||||
女贞 Ligustrum lucidum | 水分处理 Water regime | 1 | 3.395 | 0.075 | ||||
K素添加梯度 K addition gradient | 3 | 4.145 | 0.014 | |||||
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 0.393 | 0.759 |
表2 水分处理和K素添加梯度及其交互作用对元宝枫和女贞导水率损失百分数(PLC)的影响
Table 2 Effects of water regime and K addition and their interaction on percentage loss of hydraulic conductivity (PLC) of Acer truncatumand Ligustrum lucidum
树种 Species | 来源 Source | df | F | p | ||||
---|---|---|---|---|---|---|---|---|
元宝枫 Acer truncatum | 水分处理 Water regime | 1 | 2.304 | 0.139 | ||||
K素添加梯度 K addition gradient | 3 | 6.437 | 0.002 | |||||
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 3.822 | 0.019 | |||||
女贞 Ligustrum lucidum | 水分处理 Water regime | 1 | 3.395 | 0.075 | ||||
K素添加梯度 K addition gradient | 3 | 4.145 | 0.014 | |||||
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 0.393 | 0.759 |
树种 Species | 来源 Source | df | F | p |
---|---|---|---|---|
元宝枫 Acer truncatum | 水分处理 Water regime | 1 | 3.205 | 0.083 |
K素添加梯度 K addition gradient | 3 | 3.354 | 0.031 | |
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 0.545 | 0.655 | |
女贞 Ligustrum lucidum | 水分处理 Water regime | 1 | 3.864 | 0.058 |
K素添加梯度 K addition gradient | 3 | 0.762 | 0.524 | |
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 1.124 | 0.354 |
表3 水分处理和K素添加梯度及其交互作用对元宝枫和女贞水势(WP)的影响
Table 3 Effects of water regime and K addition and their interaction on water potential (WP) of Acer truncatum and Ligustrum lucidum
树种 Species | 来源 Source | df | F | p |
---|---|---|---|---|
元宝枫 Acer truncatum | 水分处理 Water regime | 1 | 3.205 | 0.083 |
K素添加梯度 K addition gradient | 3 | 3.354 | 0.031 | |
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 0.545 | 0.655 | |
女贞 Ligustrum lucidum | 水分处理 Water regime | 1 | 3.864 | 0.058 |
K素添加梯度 K addition gradient | 3 | 0.762 | 0.524 | |
水分处理×K素添加梯度 Water regime×K addition gradient | 3 | 1.124 | 0.354 |
图3 元宝枫和女贞枝条导水率损失百分数(PLC)在4个K素添加梯度间的比较 A、B、C、D: 同图1 See Fig. 1 K0、K30、K45、K60: 同表1 See Table 1 数据点为5个时间点上PLC的平均值±标准误(n=5) Bars are means of PLC in five measuring time ±SE (n=5) 同一K梯度间, 字母相同者表示平均值差异不显著(p≥0.05) The same letters indicate no significant difference between black bars and grey bars with the same K gradient (p≥0.05)
Fig. 3 Comparison in percentage loss of hydraulic conductivity (PLC) of Acer truncatumand Ligustrum lucidum twigs among four K addition gradients
图4 元宝枫和女贞枝条水势(WP)在4个K素添加梯度间的比较 A、B、C、D: 同图1 See Fig. 1 K0、K30、K45、K60: 同表1 See Table 1 数据点为5个时间点上WP的平均值±标准误 (n=5) Bars are means of WP in five measuring time ± SE (n=5) 同一K梯度间, 字母相同者表示平均值差异不显著(p≥0.05) The same letters indicate no significant difference between black bars and grey bars with the same K gradient (p≥0.05)
Fig.4 Comparison of water potential (WP) of Acer truncatumand Ligustrum lucidum twigs among four K addition gradients
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