Hydraulic properties of a mangrove Avicennia germinans as affected by NaCl

被引：30

作者：

Sobrado, MA ^{[1
]}

机构：

[1] Univ Simon Bolivar, Dept Biol Organismos, Lab Biol Ambiental Plantas, Caracas 1080A, Venezuela

来源：

BIOLOGIA PLANTARUM | 2001年 / 44卷 / 03期

关键词：

hydraulic conductance; leaf conductance; salinity; water relations;

D O I：

10.1023/A:1012479718305

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Water transport was assessed in seedlings of the mangrove Avicennia germinans L. grown at 171 and 684 Mol m(-3) NaCl. Leaf specific conductivity declined by 25% at high salinity. This was related to low specific conductivity, because Huber values remained similar. Leaves of A. germinans featured low internal conductance to water transport. This was lowered further under high salinity. Water transport constrains imposed by whole shoot and leaf blade at high salinity were balanced by stomatal regulation of water loss, which possibly maintain stem water potentials above embolisms levels.

引用

页码：435 / 438

页数：4

共 29 条

[1] Root and stem xylem embolism, stomatal conductance, and leaf turgor in Acer grandidentatum populations along a soil moisture gradient [J].

Alder, NN ;

Sperry, JS ;

Pockman, WT .

OECOLOGIA, 1996, 105 (03) :293-301

[2]

Ball Marilyn C., 1996, P461

[3]

BALL MC, 1984, PLANT PHYSIOL, V74, P7, DOI 10.1104/pp.74.1.7

[4]

Ball MC, 1999, PHYSIOLOGICAL PLANT ECOLOGY, P331

[5] CHANGES IN GAS-EXCHANGE CHARACTERISTICS AND WATER-USE EFFICIENCY OF MANGROVES IN RESPONSE TO SALINITY AND VAPOR-PRESSURE DEFICIT [J].

CLOUGH, BF ;

SIM, RG .

OECOLOGIA, 1989, 79 (01) :38-44

[6] Developmental control of xylem hydraulic resistances and vulnerability to embolism in Fraxinus excelsior L: Impacts on water relations [J].

Cochard, H ;

Peiffer, M ;

LeGall, K ;

Granier, A .

JOURNAL OF EXPERIMENTAL BOTANY, 1997, 48 (308) :655-663

[7] STOMATAL CONTROL OF XYLEM EMBOLISM [J].

JONES, HG ;

SUTHERLAND, RA .

PLANT CELL AND ENVIRONMENT, 1991, 14 (06) :607-612

[8] DIFFERENCES IN MORPHOLOGY, CARBON ISOTOPE RATIOS, AND PHOTOSYNTHESIS BETWEEN SCRUB AND FRINGE MANGROVES IN FLORIDA, USA [J].

LIN, GH ;

STERNBERG, LDL .

AQUATIC BOTANY, 1992, 42 (04) :303-313

[9] Water relations of adult Norway spruce (Picea abies (L) Karst) under soil drought in the Vosges mountains: Whole-tree hydraulic conductance, xylem embolism and water loss regulation [J].

Lu, P ;

Biron, P ;

Granier, A ;

Cochard, H .

ANNALES DES SCIENCES FORESTIERES, 1996, 53 (01) :113-121

[10] Osmolality and delta C-13 of leaf tissues of mangrove species from environments of contrasting rainfall and salinity [J].

Medina, E ;

Francisco, M .

ESTUARINE COASTAL AND SHELF SCIENCE, 1997, 45 (03) :337-344

← 1 2 3 →