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Messages - Ilya11

Pages: [1] 2 3 ... 7
1
Cold Hardy Citrus / Re: cold hardy Citrus for zone 7b?
« on: December 16, 2017, 09:10:03 AM »
Sotchi, not Sori
Two other "Russian" satsumas are available from UCR
Aguzdera and Iveria

2
Citrus General Discussion / Re: Lights????
« on: November 28, 2017, 02:30:04 PM »
I saw a video comparing side by side plants growing under red + blue LEDs compared to plants growing under all white LEDs. The plants under white LED light looked noticeably better.
There is a whole science on the light use by the plants, not just this video.
It's true red + blue LED is theoretically more efficient at being converted to energy by chlorophyll. But plants have several different chlorophyll pigments and if it's all red + blue light that may be overload on merely one of the pathways plants have for converting light to energy.
Chlorophylls A and B have absorption  spectra very close to each other. You probably refer to additional pigments , mostly carotenoid that are able to absorb longer blue radiation and transfer it to chlorophylls. They  result in improved use of blue light between 400 and 500 nm. 
 Although I still think light penetration into the leaf is a more important issue. If almost all the light is being absorbed by the chlorophyll in the surface layer of the leaf, that's an overload, and then the light is not making it down to the deeper cell layers in the leaf. Deep red wavelengths have some penetration but shorter blue wavelengths are very strongly absorbed. Of course leaves have the greatest transparency to green light.
In action spectrum measurements the difference in light penetration is already taken into consideration.  Leaves are transparent to green light because they do not contain  pigments adsorbing green light, so the green light has almost no effect. Modern white LEDs have three chromophores emitting blue light of 400-500 nm, green light of 500-570nm and red of  more than 649 nm. The green portion is almost lost, decreasing the overall efficiency by 30%
They did not run the experiment in that video but I'm very sure plants would grow better under white + red LED than they would under all white.

3
Citrus General Discussion / Re: Lights????
« on: November 28, 2017, 09:10:14 AM »
The world according to  SoCal2warm would be deep blue, not green.  ::)
Fortunately, chlorophylls and other pigments in leaves are able do adsorb the large part of blue light between 400 and 470 nm.
Moreover, the photosynthetic action  is more efficient with this  blue  than red light of 620-680nm.
Blue light is penetrating quite efficiently into leaves and is driving most of photosynthesis there.
Tungsten incandescent lamps are emitting too strongly in  useless infrared part , bringing life burn. There are other, more efficient ways to heat the air around your plant.
Actually, the most efficient for the plants is a combination of matched blue and red LEDs.

4
May be we need to launch a petition on change.org :'(

5
Citrus General Discussion / Re: Bergamot is a worth to try tree?
« on: November 25, 2017, 03:52:08 AM »
But you should not take it with certain cholesterol lowering  drugs.
Like grapefruit it is high in furanocoumarins and naringin interacting with  metabolism of basic statins.

6
Cold Hardy Citrus / Re: Yuzu... my new obsession!
« on: November 24, 2017, 03:35:45 PM »
The first one is definitely not a Yuzu. Some papeda, probably ichangensis.

7
Cold Hardy Citrus / Re: Yuzu... my new obsession!
« on: November 21, 2017, 05:03:23 PM »
Not really, but I am searching :D
Some short descriptions for more Yuzu varieties can be found here

8
Cold Hardy Citrus / Re: Yuzu... my new obsession!
« on: November 21, 2017, 02:24:33 PM »
It is a variety of mukaku Yuzu, seedless yuzu.
The defect ( chromosome asynapsis) is genetic  and results in defective ovules and pollen.
The taste of fruits  is close to Yuzu, although the juice and peels have somewhat different composition.

Japanese article with English summary and comparative tables.

9
Tamarixia is also able, although to a lesser degree  to affect Bactericera cockerelli , potato psyllid common on the West coast .

10
Thanks for the pictures. What excatly is the Sitsuma?
It is a kind of citrandarin ( poncirus x satsuma hybrid).

11
Citrus General Discussion / Re: Rootstocks ??
« on: September 19, 2017, 03:05:07 PM »
Millet,
It is quite different from Florida rootstock guide,  e.g. it contains new very promising  Alcaide-Forner citrandarins not available in USA

http://www.flrootstockselectionguide.org/

12
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 19, 2017, 12:11:26 PM »
No way, they risk a prison if they send you the stuff.

13
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 19, 2017, 07:20:56 AM »
If you want I can send you the full text article (need your email address by PM).
The scientific term of splicing is for something else, but the isolation of genes  from one plant and their insertion into the genome of other plants technically is quite straightforward.
The main obstacle is in  regulations, these operations by law should be done is special containment facilities and the final plants require special authorizations.

14
Citrus General Discussion / Re: Rootstocks ??
« on: September 19, 2017, 03:49:47 AM »
Here it is ( for those who can read Spanish)

15
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 16, 2017, 01:48:19 PM »
It is because Key lime has a very short juvenile period, an easy target.

16
Citrus General Discussion / Pigmented Mexican limes
« on: September 16, 2017, 10:22:27 AM »
Anthocyanin containing  pigmented Mexican limes were produced in Florida by transgenic insertion of genes from red grape (Vitis):

 

 and Moro orange:



http://journal.ashspublications.org/content/141/1/54.abstract   

17
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 05:15:17 PM »
Swingle 4475 is a  quite common rootstock, macrophilla will probably work also, but I do not have first hand experience with it.

18
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 12:40:48 PM »
Ilya what root stock would you recommend? Definitely will try that.
For me, the best is citrumelo 4475  or citrumelo 5*, the larger the better, in Japan they are using 3 year old seedlings of Shikuwasa.

19
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 03:34:08 AM »
From my experience, grafting of unmature wood on the strong rootstock results in much more rapid growth and development. The flowers could appear in three-four years.
This approach is  being used in the Japanese breeding program. 

20
Ponderosa has nothing to do with lemons. Genetically it is 40% pomelo, 60% citron with maternal input from pomelo.

21
Citrus General Discussion / Re: Large spines on second growth
« on: August 29, 2017, 04:15:48 AM »
The quicker is growth, the larger are the spines.

22
Citrus General Discussion / Re: Large spines on second growth
« on: August 28, 2017, 11:39:50 AM »
It is normal, thet could be even longer.

23
Cold Hardy Citrus / Re: citrus varieties in order of cold-hardiness
« on: August 22, 2017, 01:41:35 PM »
I have never seen an experiment where several trees of each of these were compared with each other right around the critical cold temperature and where one type survived and one did not. Or I mean where one group clearly outperformed another group, with multiple trees from each group.

Instead of playing with unfounded pleonasmal rhetoric, you better improve your bot searching engine.
The field  experiment including Yuzu, ichang papeda and Changsha has been made many years ago.
http://horttech.ashspublications.org/content/13/3/540.full.pdf+html

24
Cold Hardy Citrus / Re: breeding cold hardy pomelo
« on: August 22, 2017, 01:17:08 PM »
Millet,
Valentine parentage  is more complex,
it is ‘Siamese Sweet’ pummelo x ( ‘Ruby’ blood orange x 'Dancy' mandarin) that can be compared to PummeloxClementine

25
You should read more attentively the articles you cited. The story about gynogenetic haploids induced by triploid pollen has nothing to do with real world pollination and fruiting. All was done in vitro.

You are stretching your conclusions and are very reiterative and unclear.

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