摘要
用P-V曲线技术研究了三种海滨木本植物在干旱胁迫条件下渗透调节的能力。结果表明经干旱处理植物水饱和时的渗透势和初始质壁分离时的渗透势都降低。而抗旱能力较强的桉属植物钝叶桉(Eucalyptus obtusifolia)和产胶桉(Eucazyptus gummifera)的ψ_x^(100)和ψ_x^0处于较低水平。与Epacris obtusifolia相比,它们在叶水势和土壤水势较低时,仍然可维持组织的紧涨和较高的叶导性。
Approaching of osmotic adjustment in Epacris obtusifolia, Eucalyptus obtusifolia and Eucalyptus gummsfelia was made by pressure-chamber technique under drought stress. Plants decreased the osmotic potential at full turgor and at the turgor lost point after drought treatment. Eucalyptus obtusifolta and Eucalyptus gummifera had lower ψ_x^(100) and ψ_x^0 than Epacris obtusifolia. And they were able to maintain leaf turgor and conductance at greater tissure water deficits, and lower leaf and soil water potentials, when compared with Epacris obtusifolla.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
1991年第4期107-112,共6页
Journal of Fujian Normal University：Natural Science Edition
关键词
植物
干旱胁迫
渗透调节
土壤水势
drought stress, P-V curve, osmotic adjustment, water potential, turgor, conductance
