Is Geotropism positive or negative? This response to gravity is called geotropism, or gravitropism. The roots are exhibiting positive geotropism, or growth with gravity, while thestem is exhibiting negative geotropism, or growth against gravity. Different parts of a plant grow in opposite direction...
A photoreceptor located here could not be responsible for the transmission from the positive to negative phototropic bending as observed in sporangiophores immersed in media of varying refractive indices. The calculations support the alternative hypothesis that the photoreceptor is situated at the plasma...
Cation exchange occurs when the cations containing positive charge move toward the area containing the negative charge. The negative charge is present...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tou...
RESULTS CLas detection and HLB symptom development Leaf samples collected at week 7 did not exhibit the characteristic blotchy mottle appearance and were RT-qPCR negative for CLas. Continued RT-qPCR analysis for CLas was conducted every two weeks after inoculation. Positive confirmation of CLas in ...
(ETR1, ETR2, EIN4, and ERS1), negative regulator CTR1, positive regulators EIN2, EIN3/EILs (EIN3-like proteins), and the ethylene response factor (ERF); whereas, only expression ofETR2and someERFswas found to change significantly during stem bending. The members ofERFsshowed different ...
Interestingly, this could be explained neither by a down-regulation of the expression of the positive regulators ARF6 or/and ARF8 nor an up-regulation of the negative regulator ARF17 (Fig. 3a). ARF transcriptional activity is negatively regulated by transcriptional repressors of the Aux/IAA ...
S. mansoni-infection enhanced positive phototropism of vector snails and infected snails spent significantly more time in light. Possibly, these behavioral changes help the parasite to be released efficiently from the infected intermediate hosts, and to infect mammalian hosts.Maeda, HirokiHatta, Takeshi...
The windswept morphology is consistent with the morphologies associated with other tropisms (i.e. phototropism and gravitropism). Tropisms are defined as a growth response towards (positive) or away (negative) from an environmental stimulus. The asymmetric growth form of windswept trees appears to be...
AtANN1 and AtANN2 are involved in phototropism of etiolated hypocotyls of Arabidopsis by regulating auxin distribution. AoB Plants 2022, 14, plab075. [Google Scholar] [CrossRef] Lin, X.; Li, R.; Zhou, Y.; Tang, F.; Wang, Y.; Lu, X.; Wang, S.; Yao, Y.; Liu, J.; Hu, X....