Leaf tensity: a method for rapid determination of water requirement information in Brassica napus L.

[摘要] Water regulation caused by enzymes, such as carbonic anhydrase (CA), changes the water status, making it difficult to diagnose water deficit using leaf water potential ( ψ L ) or stomatal conductance ( g s ). Therefore, new methods for timely and accurately determining plant water status should be established. In this study, CA activity, ψ L , leaf tensity ( T d ), photosynthetic characteristics and plant growth of Brassica napus L. seedlings under drought and subsequent rewatering were analysed. Results indicated that T d could reflect the plant water status better than ψ L or g s and played an important role in the photosynthesis of B . napus . B. napus exhibited good restorability at the 40 g L −1 polyethylene glycol level. The rewatering strategy for B . napus was excellent at 40 g L −1 (−0.15 MPa) →20 g L −1 (−0.11 MPa). T d could be used for the rapid determination of water requirement information in B . napus during winter drought period.

[学科分类] 纳米科学和纳米技术

[关键词] Carbonic anhydrase;irrigation time;photosynthetic characteristics;plant dry weight;water potential