Spatial Distribution Analysis of Photosynthetic Function within a Tomato Plant Canopy in a Large-Scale Greenhouse

• TAKAYAMA Kotaro

  Faculty of Agriculture, Ehime University

• NISHINA Hiroshige

  Faculty of Agriculture, Ehime University

• HISAEDA Kazunori

  Sera Farm Co., Ltd.,

• SUEKI Takeshi

  Faculty of Agriculture, Ehime University

• HARADA Satoshi

  Kagome Co., Ltd.,

Bibliographic Information

Other Title

• 太陽光利用型植物工場のトマト群落における光合成機能の空間分布の解析
• タイヨウコウ リヨウガタ ショクブツ コウジョウ ノ トマト グンラク ニ オケル コウゴウセイ キノウ ノ クウカン ブンプ ノ カイセキ

Abstract

We previously characterized the vertical distribution of photosynthetic functions within a tomato plant canopy in a large-scale commercial greenhouse. Here we present a more detailed characterization of the spatial distribution of photosynthetic function within a tomato plant canopy. The leaves of the canopy were divided into spatial groups oriented laterally with respect to the path (path-side and inside, which is adjacent to another row of tomato plants) and vertically (upper, middle and lower). Photosynthetic-light response curves, chlorophyll content, chlorophyll fluorescence parameters, and the SPAD values were measured for each leaf group, and we discuss the relationships between these parameters and the light environment. Maximum photosynthetic rates of the leaves in both lower layer and inside/middle leaf groups were approximately half those of both upper layer and path-side/middle leaf groups. The chlorophyll a/b ratios of both lower layer and inside/middle leaf groups were significantly lower than in both upper layer and path-side/middle leaf groups. The lower chlorophyll a/b ratios for both lower layer and inside/middle leaf groups suggests that these leaf groups had become acclimated to low-light conditions. Conversely, the chlorophyll content and fluorescence parameters (i.e., F_v/F_m) of both lower layer and the inside/middle leaf groups were relatively higher than those of both upper layer and path-side/middle leaf groups. These findings imply that the photosynthetic rates of leaves in both lower layer and inside/middle leaf groups, which are associated with low maximum photosynthetic rates, would increase if the light environment was improved.

Journal

• Shokubutsu Kankyo Kogaku

  Shokubutsu Kankyo Kogaku 22 (4), 175-180, 2010

  Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

Keywords

• greenhouse
• light environment
• low-light acclimation
• photosynthesis
• tomato canopy

Details

• CRID: 1390282680209139584
• NII Article ID: 10027708876
• NII Book ID: AA12010914
• DOI: 10.2525/shita.22.175
• ISSN: 18803563
• ISSN: 18802028
• NDL BIB ID: 10913835
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030810031
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10913835
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed