منابع مشابه
Hairy roots are more sensitive to auxin than normal roots.
Responses to auxin of Lotus corniculatus root tips or protoplasts transformed by Agrobacterium rhizogenes strains 15834 and 8196 were compared to those of their normal counterparts. Three different types of experiments were performed, involving long-term, medium-term, or short-term responses to a synthetic auxin, 1-naphthaleneacetic acid. Root tip elongation, proton excretion by root tips, and ...
متن کاملPhosphate-deprived roots are hypersensitive to auxin.
Low concentrations of phosphate (Pi) in soil trigger alterations to the architecture of the root system that increase a plant’s capacity to absorb Pi. Many plants stimulate the uptake of this essential nutrient by promoting lateral root (LR) formation, increasing root hair length and density (see figure), and suppressing primary root growth. Auxin is a key player in LR development: exogenous au...
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We introduce a class of polynomial maps that we call polynomial roots of powerseries, and show that automorphisms with this property generate the automorphism group in any dimension. In particular we determine generically which polynomial maps that preserve the origin are roots of powerseries. We study the one-dimensional case in greater depth.
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In this paper the asymptotic properties of ARMA processes with complex-conjugate unit roots in the AR lag polynomial are studied. These processes behave quite di¤erently from regular unit root processes (with a single root equal to 1). In particular, the asymptotic properties of a standardized version of the periodogram for such processes are analyzed, and a nonparametric test of the complex un...
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W hy is income per capita higher in some societies and much lower in others? Answers to this perennial question have evolved over time. Decades ago, the emphasis was on the accumulation of factors of production and exogenous technological progress. Later, the focus switched to policies and incentives endogenously affecting factor accumulation and innovation. More recently, the attention has mov...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1904
ISSN: 0006-8071
DOI: 10.1086/328476