Developmental Physiology

Fellenberg, Günter

doi:10.1007/978-3-642-68752-5_11

Cited by 1 publication

(1 citation statement)

References 112 publications

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“…Thus, age dependent differences were observed for plant toler ance to low temperatures [5], water deficit [7], and radiation [8]. It was found that tolerance of germinat ing seeds and seedlings is low, whereas it improves markedly during vegetative organ development.…”

Section: Introductionmentioning

confidence: 99%

Barley plant response to cadmium action as dependent on plant age

Kaznina

Титов

Топчиева

et al. 2011

Russ J Plant Physiol

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Age dependent differences in the responses of 3 day old (the phase of seed germination) and 7 day old (the phase of seedlings) of barley (Hordeum vulgare L., cv. Zazerskii 85) plants to treatment with cadmium (100 µM). Four day long exposure to the cadmium solution retarded root growth and suppression of the photosynthetic apparatus in germinating seeds, whereas in seedlings, the roots continued to grow actively and parameters characterizing functioning of the photosynthetic apparatus were close to control val ues. In the presence of cadmium, in the roots of plants the level of HvPCS gene encoding phytochelatin syn thase and the content of phytochelatins (PC) increased independently of the plant age. Distinctly, changes in the content of reduced glutathione (GSH) depended on the plant age: in 3 day old seedlings the content of GSH reduced after 40 day long exposure to cadmium; in contrast, in 7 day old plants, it increased. We con cluded that differences in the tolerance to cadmium of plants differing in age are related to their anatomic, morphological, physiological, and biochemical properties corresponding to particular developmental stages and also to differences in functioning of different mechanisms of metal detoxification, in particular, to acti vation of GSH synthesis and a great increase in the content of PC in the older plants.

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Section: Introductionmentioning

confidence: 99%