#cytokinin

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A small molecule was identified that could, in the presence of auxin, stimulate tobacco pith parenchyma tissue to proliferate in culture (Figure 15.11A).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[musicmakesyousmart]

Cytokinin - Colore del dolore

Econore

2022

[pepikhipik]

Rostliny uvažují jako architekti. Brněnský výzkum popsal, jak staví

Rostliny uvažují jako architekti, aby si zajistily dostatek vody, zjistil tým vědců z institutu CEITEC brněnské Masarykovy univerzity a odborníků z dalších pracovišť. Hormony cytokininy brání předčasnému zpevnění buněčných stěn v cévních svazcích, čímž zajišťují optimální vývoj vodivých pletiv. Pokud stěna předčasně ztuhne, cévy mají menší průměr a vedou méně vody. Objev může mít význam nejen pro…

Rostliny uvažují jako architekti. Brněnský výzkum popsal, jak staví

[biology-geology-beaches-india]

TSRNOSS, p 693.

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This increase is due, at least in part, to an induction of expression of one member of the IPT gene family, IPT3.

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[whats-in-a-sentence]

The resulting elevated cytokinin levels not only blocked senescence, but also limited further expression of the ipt gene, preventing cytokinin overproduction (Figure 22.20).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[whats-in-a-sentence]

As shown in Figure 15.37A, both cytokinin and ABA exhibit primary cross regulation when they induce transcription of ABI4 to, in turn, regulate transcription of a variety of biosynthetic and stress response genes. However, cytokinin and ABA regulation of ABI4 transcription also provides an example of secondary cross-regulation, as induction of ABI4 transcription acts on auxin signaling by reducing rootward auxin flows within root vascular tissues that initiate lateral root formation (Figure 15.37B). (...) ABI4 positively regulates the endosomal ASPARTYL PROTEASE2 (APA2), which degrades the ABCB4 auxin transporter that regulates auxin flows in root epidermal cells (Figure 15.37C).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[whats-in-a-sentence]

Cytokinin binding to the CHASE domain of its receptor triggers autophosphorylation of a histidine residue on the transmitter domain, followed by transfer of this same phosphate to the aspartate residue on the receiver domain (Figure 15.29). (...) The newly phosphorylated AHPs function as signaling intermediates that transmit membrane-perceived cytokinin signals to nuclear-localized response regulators (termed ARABIDOPSIS RESPONSE REGULATOR or ARR) by transferring the phosphate group to an aspartate on the receiver domain of the ARR (see Figure 15.29). (...) They fall into two basic classes: the type-A ARR genes, the products of which are made up solely of a receiver domain, and the type-B ARR genes, which also include an output domain containing DNA-binding transcription activation sites (see Figure 15.29).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.