-
- 徐 会連
- 自然農法国際研究開発センター•農業試験場
-
- Gauthier Laurent
- Hortculture Research Center, Faculty of Agriculture and Food, Laval University
-
- Gosselin Andre
- Hortculture Research Center, Faculty of Agriculture and Food, Laval University
書誌事項
- タイトル別名
-
- Greenhouse Tomato Photosynthetic Acclimation to Water Deficit and Response to Salt Accumulation in the Substrate
- Greenhouse tomato photosynthetic acclim
この論文をさがす
抄録
Greenhouse tomato plants (Lycopersicon esculentum Mill. cv. Capello) were grown in a peat-moss based substrate (70% sphag peat and 30% perlite, v/v) and treated with a salinity stress (4.5 mS cm-1 of electrical conductivity, EC) and a low (55 ± 8% on gra-vimetric basis) substrate water content (SWC) to examine the effects of salt accumulation and a prolonged substrate water deficit on photosynthesis and plant water relations. Net photosynthetic rate (Pn) decreased by 24% compared to the control one day after SWC was depleted to 55%. However, as SWC was maintained at the same level for several days, the effect of water stress diminished, with the decreasing extent of 14%, 15%, and 14% compared to the control on the 11th, 16th, and 28th days, respectively, from the beginning of treatments. This demonstrated that tomato plants acclimated to substrate water deficit. One day after SWC reached 55%, leaf turgor potential (ΨP) decreased sub-stantially as leaf water potential (ΨW) declined. However, as SWC was maintained con-stant over a period, ΨP recovered to a large extent even at the same Ψw level. This tur-gor recovery was based on osmotic adjustment shown by the decrease in osmotic poten-tial (Ψπ) at fully hydrated status. The effect of salinity on Pn was not observed under both high and low SWC one day after the beginning of treatments, but that effect became larger and larger as the treatment was prolonged. Although ΨW and Ψp declined steadi-ly in salinity stressed plants during the experiment, osmotic adjustment also occurred, re-sulting in a partial turgor maintenance. The combined treatment of salinity and water de-ficit imposed an additive effect on Pn, ΨW, and Ψp, which did not allow Pn to recover despite the osmotic adjustment.
収録刊行物
-
- 園芸学会雑誌
-
園芸学会雑誌 65 (4), 777-784, 1997
一般社団法人 園芸学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282681280715136
-
- NII論文ID
- 10006101178
-
- NII書誌ID
- AN00025257
-
- COI
- 1:CAS:528:DyaK2sXitFOqsrw%3D
-
- ISSN
- 1880358X
- 00137626
-
- NDL書誌ID
- 4173382
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可