NDLI: Changes in chloroplast ultrastructure in leaves of drought-stressed maize inbred lines

Content Provider	Springer Nature Link
Author	Shao, R. X. Xin, L. F. Zheng, H. F. Li, L. L. Ran, W. L. Mao, J. Yang, Q. H.
Copyright Year	2016
Abstract	Chloroplasts are commonly the site of the earliest abiotic injury visible in plant ultrastructure. In this study, six inbred lines of maize (Zea mays L.) were used to analyze changes in the ultrastructure of chloroplasts and related physiological parameters under conditions of drought stress simulated by 20% polyethylene glycol 6000 (−0.6 MPa) for two days. Chloroplasts of three maize lines proved to be more sensitive. They showed changes in the ultrastructure in response to drought, including damage of thylakoid membranes, an increase in the number and size of plastoglobuli, swelling of thylakoid membranes both stromal and granal, disorganization of the thylakoid membrane system, an obvious increase in the intrathylakoid space, and a decrease in the length-to-width ratio and area of chloroplasts. In addition, the contents of malondialdehyde increased markedly in the sensitive lines. Contrary to the sensitive lines, stable structures and shapes of chloroplasts were observed in the drought-resistant lines; it could be considered as an advantage contributing to drought tolerance in the plants. In addition, the drought index of leaf fresh mass (LMDI) in the drought-sensitive lines was ≤ 0.5, which was also associated with a lower content of leaf chlorophyll. In contrast, drought tolerance coincided with lesser growth reduction, and higher LMDI and leaf chlorophyll content.
Starting Page	74
Ending Page	80
Page Count	7
File Format	PDF
ISSN	03003604
Journal	Photosynthetica
Volume Number	54
Issue Number	1
e-ISSN	15739058
Language	English
Publisher	The Institute of Experimental Biology of the Czech Academy of Sciences
Publisher Date	2015-07-01
Publisher Place	Praha
Access Restriction	Subscribed
Subject Keyword	Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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