Effects of thinning in a Pinus sylvestris L. stand on foliar water relations of Fagus sylvatica L. seedlings, planted within the pinewood

被引:40
作者
Aranda, I [1 ]
Gil, L [1 ]
Pardos, JA [1 ]
机构
[1] Univ Politecn Madrid, Escuela Tecn Super Ingn Montes, Unidad Anatom Fisiol & Genet Forestal, E-28040 Madrid, Spain
来源
TREES-STRUCTURE AND FUNCTION | 2001年 / 15卷 / 06期
关键词
Fagus sylvatica; water relations; drought; southernmost populations; pressure-volume curves;
D O I
10.1007/s004680100109
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Planting of beech in old Scots pine plantations, could facilitate the extension of adjoining small natural populations of beech in the centre of the Iberian Peninsula. To be successful the survival and growth of seedlings after outplanting must be compatible with microclimatic conditions within thinned pine woods. The present paper deals with water relations in beech seedlings following the variation of available radiation and water as a result of thinning. The seedlings were established under an old Scots pine plantation. After pine felling, four situations were generated in terms of radiation. Hemispherical photographs were taken, and global relative irradiance was calculated for every treatment. During two growing seasons predawn water potential (Psi (pd)) was measured and leaf water parameters were derived from P-V curves. The Psi (pd) diminished through the season in all four situations, and the highest values, were found when pine density was lowest. Osmotic potential at turgor lost (Psi pi (0)) was higher in early summer. A negative relationship was-found between osmotic potential at full turgor (Psi (pi full)) and symplast solute content on a dry weight basis (N-s). Under the lowest irradiance (unthinned pine trees), Psi (pi full) and Psi (pi0) were the highest and the bulk modulus of elasticity (epsilon (max)) the lowest; epsilon (max) decreased in response to the lowest Psi (pd) measured at the end of summer 1998. It was followed by a reduction in the symplastic relative water content and N-s, irrespective of the irradiance. Osmotic adjustment, as a drought tolerance mechanism, was limited under shade conditions (unthinned pine trees), restricting the acclimation of beech seedlings to drought. Therefore, the presence of overstory, necessary for a successful implantation, should not be extended for too many years because of the risk of negative effects on growth and survival, particularly after frequent dry summers.
引用
收藏
页码:358 / 364
页数:7
相关论文
共 52 条
[11]  
ARANDA I, 2001, IN PRESS FOR ECOL MA
[12]   Foliar dehydration tolerance of twelve deciduous tree species [J].
Augé, RM ;
Duan, XG ;
Croker, JL ;
Witte, WT ;
Green, CD .
JOURNAL OF EXPERIMENTAL BOTANY, 1998, 49 (321) :753-759
[13]   OSMOTIC AND TURGOR ADJUSTMENT IN ROSA FOLIAGE DROUGHT-STRESSED UNDER VARYING IRRADIANCE [J].
AUGE, RM ;
STODOLA, AJW ;
PENNELL, BD .
JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE, 1990, 115 (04) :661-667
[14]  
Aussenac G, 2000, ANN FOR SCI, V57, P287
[15]   Leaf water relations of competitive Fagus sylvatica and Quercus petraea trees during 4 years differing in soil drought [J].
Backes, K ;
Leuschner, C .
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE, 2000, 30 (03) :335-346
[16]   PHYSIOLOGICAL ECOLOGY OF PLANT SUCCESSION [J].
BAZZAZ, FA .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1979, 10 :351-371
[17]   SEASONAL-CHANGES IN TISSUE ELASTICITY IN CHAPARRAL SHRUBS [J].
BOWMAN, WD ;
ROBERTS, SW .
PHYSIOLOGIA PLANTARUM, 1985, 65 (03) :233-236
[18]   SEASONAL AND DIURNAL WATER RELATIONS ADJUSTMENTS IN 3 EVERGREEN CHAPARRAL SHRUBS [J].
BOWMAN, WD ;
ROBERTS, SW .
ECOLOGY, 1985, 66 (03) :738-742
[19]   WATER RELATIONS PARAMETERS ON SINGLE LEAVES OBTAINED IN A PRESSURE BOMB AND SOME ECOLOGICAL INTERPRETATIONS [J].
CHEUNG, YNS ;
TYREE, MT ;
DAINTY, J .
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 1975, 53 (13) :1342-1346
[20]  
Collet C, 2001, ANN FOR SCI, V58, P127, DOI 10.1051/forest:2001112