Leaf wetting mitigates midday depression of photosynthesis in tomato plants

G. Yokoyama, D. Yasutake, T. Tanizaki, M. Kitano

Research output: Contribution to journalArticle

Abstract

We studied the effects of leaf wetting on midday depression of photosynthesis regarding plant water balance and leaf morphological traits. The plants without leaf wetting showed a significant reduction in midday photosynthesis with a concomitant decrease with leaf conductance, because of lower leaf water potential (-1.3 MPa) due to excessive transpiration water loss. However, midday depression was not observed in the plants with leaf wetting. Lower contact angle between leaf surface and water droplet showed that tomato leaves have lower water repellency. However, water on the leaf surface completely dried within 20 min indicating that effect of water coverage on stomata for CO2 uptake was small. In addition, leaf wetting significantly decreased evaporative demands, which contributed to maintaining appropriate water balance and avoided midday stomatal closure, and it contributed to mitigation of midday depression of photosynthesis.

Original languageEnglish
Pages (from-to)740-747
Number of pages8
JournalPhotosynthetica
Volume57
Issue number3
DOIs
Publication statusPublished - Jan 1 2019

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Photosynthesis
Lycopersicon esculentum
photosynthesis
tomatoes
Water
leaves
Plant Leaves
water
water balance
leaf conductance
contact angle
leaf water potential
stomata
droplets
transpiration
uptake mechanisms

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Leaf wetting mitigates midday depression of photosynthesis in tomato plants. / Yokoyama, G.; Yasutake, D.; Tanizaki, T.; Kitano, M.

In: Photosynthetica, Vol. 57, No. 3, 01.01.2019, p. 740-747.

Research output: Contribution to journalArticle

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